- M. Eng. < M.Eng.
- MEng < M.Eng.
- M.B. < MB
- mercaptobenzothiazole < MBT
- emcee < MC
- milf < MILF
- Mkn < MKN
- Mkr < MKR
- mpg < MPG
- Mrk < MRK
- mts < MTS
- M.Y.O.B. < MYOB
- ma nishtana < Ma Nishtana
- Masai < Maasai
- Massai < Maasai
- Maestricht < Maastricht
- macgyver < MacGyver
- Makedonia < Macedonia
- Machiavelian < Machiavellian
- machometer < Machmeter
- maconochie < Maconochie
- Madagascarian < Madagascan
- Madagascarian < Madagascan
- mafioso < Mafioso
- Magna Chartas < Magna Cartas
- Magnae Chartae < Magnae Cartae
- magnehelic < Magnehelic
- Magrittian < Magrittean
- Mahā Bhārata < Mahabharata
- maha bharata < Mahabharata
- maha-bharata < Mahabharata
- mahābhārata < Mahabharata
- mahā bhārata < Mahabharata
- mahā-bhārata < Mahabharata
- Mahmood < Mahmud
- maiden < Maiden
- Maidun < Maiduan
- mainstreet < Main Street
- Maisy < Maisie
- Malagash < Malagasy
- Malagash < Malagasy
- Malaŵian < Malawian
- Malaŵian < Malawian
- Malikite < Maliki
- Malikist < Maliki
- Maltesian cross < Maltese cross
- Moluccan < Malukan
- Moluccan < Malukan
- mammalia < Mammalia
- manchego < Manchego
- Mantchou < Manchu
- Mantchoo < Manchu
- Manchoo < Manchu
- Mandchuria < Manchuria
- Mandchurian < Manchurian
- Mandchurian < Manchurian
- Mandean < Mandaean
- Mandevillean < Mandevillian
- Mundingo < Mandingo
- Manicheist < Manichaean
- Manicheist < Manichaean
- Maniote < Maniot
- Mantinea < Mantineia
- Manks < Manx
- Manks < Manx
- Mauming < Maoming
- Mahori < Maori
- Mar < Mar.
- Mahratta < Maratha
- Mahratta < Maratha
- Mahratti < Marathi
- Mahrati < Marathi
- Murathee < Marathi
- Murathee < Marathi
- Marche < March
- mardi gras < Mardi Gras
- margherita < Margherita
- marigold < Marigold
- Maryolatry < Mariolatry
- Marcan < Markan
- markovian < Markovian
- marsala < Marsala
- martello < Martello
- martian < Martian
- Martlemas < Martinmas
- marxism < Marxism
- Meshed < Mashhad
- Mazovian < Masovian
- Mazovian < Masovian
- Mazovian < Masovian
- Miṣr < Masr
- Mazu < Matsu
- Maunday Thursday < Maundy Thursday
- Maunday coin < Maundy coin
- Maunday money < Maundy money
- Maurician < Mauritian
- Maurician < Mauritian
- Maye < May
- May queen < May Queen
- Mayaguez < Mayagüez
- Mazandarani < Mazanderani
- Mazandarani < Mazanderani
- Mazandarani < Mazanderani
- Matsu < Mazu
- Mechlin < Mechelen
- Medician < Medicean
- Mediaeval Latin < Medieval Latin
- Mephitis < Mefitis
- meibomian < Meibomian
- Melvillean < Melvillian
- mendelian < Mendelian
- menippea < Menippea
- Mennonist < Mennonite
- mephistophelean < Mephistophelean
- Merotic < Meroic
- Happy Christmas < Merry Christmas
- mesoamerican < Mesoamerican
- Mattatron < Metatron
- Medcalf < Metcalf
- Metsovon < Metsovo
- Mex < Mex.
- Mejico < Mexico
- Medjimurye < Međimurje
- Mikmak < Mi'kmaq
- middle-earth < Middle-earth
- Midean < Midian
- Milkah < Milcah
- Milky-Way Galaxy < Milky Way Galaxy
- Miller of the Dee < Miller of Dee
- Abbott-Miller tube < Miller-Abbot tube
- Minæan < Minean
- Minæan < Minean
- minkowskian < Minkowskian
- Minnesotian < Minnesotan
- Minnesotian < Minnesotan
- minoress < Minoress
- Mensk < Minsk
- Mischnic < Mishnaic
- Miss Thang < Miss Thing
- Missourah < Missouri
- Misses < Missus
- Mithraicism < Mithraism
- Miztec < Mixtec
- Miztec < Mixtec
- MOU < MoU
- Mobutuist < Mobutist
- Mesogoth < Moesogoth
- Mahumetan < Mohammedan
- Mohometanism < Mohammedanism
- Mahumetanism < Mohammedanism
- Muhammedanism < Mohammedanism
- Mohamedanism < Mohammedanism
- Muhamedanism < Mohammedanism
- Mohametanism < Mohammedanism
- mohawk < Mohawk
- Mohock < Mohawk
- Mahican < Mohican
- Moldovenism < Moldovanism
- Monday morning quarterback < Monday-morning quarterback
- Mogulian < Mongolian
- Monothelite < Monothelete
- Monotheletic < Monothelitic
- Monotheletism < Monothelitism
- monsignor < Monsignor
- Mont-de-Piété < Mont de Piété
- Monterey < Monterrei
- Montréal < Montreal
- Moki < Moqui
- Moki < Moqui
- Mauresque < Moresque
- morisco < Morisco
- Moroccanisation < Moroccanization
- Moroccanise < Moroccanize
- Moskva < Moscow
- Mosco < Moscow
- mountie < Mountie
- Muzarab < Mozarab
- Muzarabic < Mozarabic
- Micius < Mozi
- Misses < Mrs
- Missus < Mrs
- M2F < MtF
- Mtl. < [[Mtl}} Lua error in Module:parameters at line 360: Parameter 1 should be a valid language or etymology language code; the value "Mtl" is not valid. See WT:LOL and WT:LOL/E. {{abbreviation of]]
- MTL < [[Mtl}} Lua error in Module:parameters at line 360: Parameter 1 should be a valid language or etymology language code; the value "Mtl" is not valid. See WT:LOL and WT:LOL/E. {{abbreviation of]]
- Mohammed < Muhammad
- Mohammed < Muhammad
- Muhammed < Muhammad
- Muhammed < Muhammad
- Mouhammad < Muhammad
- Mohammedanise < Muhammadanize
- Muḥammad < [[Muhammad}} [Muhammad] {{defdate]]
- mukhabarat < Mukhabarat
- munchkin < Munchkin
- munro < Munro
- Murjite < Murji'ite
- Murphy's Law < Murphy's law
- Moscovian < Muscovian
- Moscovian < Muscovian
- Muş < Mush
- Mooslim < Muslim
- Muslimisation < Muslimization
- Mussalman < Mussulman
- Mussulmaun < Mussulman
- Mutt-and-Jeff < Mutt and Jeff
- muwahhid < Muwahhid
- muzak < Muzak
- Moebius band < Möbius band
- Mullerian duct < Müllerian duct
- Münchausen's syndrome < Münchausen syndrome
- N. T. < N.T.
- Nasa < NASA
- Nato < NATO
- CBN < NBC
- nor < NOR
- N.O.S. < NOS
- notam < NOTAM
- nrg < [[NRG}}; Lua error in Module:parameters at line 360: Parameter 1 should be a valid language or etymology language code; the value "NRG" is not valid. See WT:LOL and WT:LOL/E.; {{initialism of]]
- N.T. < NT
- N. T. < NT
- Nu < NU
- nabothian < Nabothian
- Nagmaal < Nachtmaal
- Al-Nakba < Nakba
- Nashi < Nakhi
- Namburi < Nambudiri
- Namoa < Nan'ao
- Naperian < Napierian
- nashi < Nashi
- Nastalik < Nastaliq
- native < Native
- native < Native
- Navaratri < Navratri
- Nasorean < Nazarene
- Nasoraean < Nazarene
- Nazarean < Nazarene
- Nazarean < Nazarene
- nazi < Nazi
- nazi < Nazi
- nazism < Nazism
- Nashitse < Našice
- Nabuchodonosor < Nebuchadnezzar
- Nigritic < Negritic
- Nigra < Negro
- negrobilia < Negrobilia
- neo-Kantian < Neo-Kantian
- Neodruidism < Neo-druidism
- Nepaulese < Nepalese
- Nepaulese < Nepalese
- Nass < Ness
- The Netherlands < Netherlands
- neutral Paralympic athletes < Neutral Paralympic Athletes
- Noo Yawk < New York
- N'Yawk < New York
- New Yawk < New York
- County of New York < New York County
- New Zild < New Zealand
- Newton's Cradle < Newton's cradle
- newtonian < Newtonian
- nichrome < Nichrome
- nickelodeon < Nickelodeon
- Nigerian Prince < Nigerian prince
- Ninkharsag < Ninhursag
- Nissan < Nisan
- nitinol < Nitinol
- Nizhniy Novgorod < Nizhny Novgorod
- noctiluca < Noctiluca
- Nong Bua Lam Phu < Nong Bua Lamphu
- norcal < Norcal
- nor-cal < Norcal
- nordic skiing < Nordic skiing
- North Ndebele < Northern Ndebele
- Norroway < Norway
- nosferatu < Nosferatu
- Nov < Nov.
- Novembr < November
- Novorossia < Novorossiya
- nowheresville < Nowheresville
- Nowhereville < Nowheresville
- Nürnberg < Nuremberg
- Newyorican < Nuyorican
- Newyorican < Nuyorican
- nuyorican < Nuyorican
- O. < O
- O level < O-level
- OE. < OE
- OF. < OF
- OK. < [[OK}} Lua error in Module:parameters at line 360: Parameter 1 should be a valid language or etymology language code; the value "OK" is not valid. See WT:LOL and WT:LOL/E. {{abbreviation of]]
- Ok < [[OK}} (OK) {{gloss]]
- omfg < OMFG
- O. M. G. < OMG
- op < OP
- or < OR
- O/RM < ORM
- O. S. < OS
- otoh < OTOH
- ott < OTT
- abjuration oath < Oath of Abjuration
- Oct < Oct.
- Octobr < October
- Octr < [[Octr.}} (Octr.) {{gloss]]
- Wodenism < Odinism
- Œnanthe < Oenanthe
- Ojibwa < Ojibwe
- Ojibway < Ojibwe
- Ok < [[Ok.}} Lua error in Module:parameters at line 360: Parameter 1 should be a valid language or etymology language code; the value "Ok." is not valid. See WT:LOL and WT:LOL/E. {{abbreviation of]]
- Okanogan < Okanagan
- Okanogan < Okanagan
- Okla < [[Okla.}} Lua error in Module:parameters at line 360: Parameter 1 should be a valid language or etymology language code; the value "Okla." is not valid. See WT:LOL and WT:LOL/E. {{abbreviation of]]
- Ollague < Ollagüe
- Olmütz < Olomouc
- Olmutz < Olomouc
- Winter Olympic Games < Olympic Winter Games
- Omawhaw < Omaha
- Ont < Ont.
- Ophian < Ophite
- Orkhomenos < Orchomenos
- order of council < Order of Council
- Ordovian < Ordovician
- Ordovian < Ordovician
- Øresund Bridge < Oresund Bridge
- Öresund Bridge < Oresund Bridge
- orient < Orient
- Eastern Republic of Uruguay < Oriental Republic of Uruguay
- Orknies < Orkneys
- Hormuz < Ormus
- Elunchun < Oroqen
- Usama < Osama
- Ossetin < Ossetian
- Ossetin < Ossetian
- Ossetin < Ossetian
- otterhound < Otterhound
- Othman < Ottoman
- Othman < Ottoman
- Ouija board < Ouija
- ouija < Ouija
- oxford < Oxford
- pinvoke < P/Invoke
- PAINS < PAINs
- permanova < PERMANOVA
- P. I. < PI
- P.I. < PI
- PMQ < PMQs
- png < PNG
- PoC < POC
- poet's day < POETS day
- pov < POV
- PPH < PP&H
- ppg < PPG
- p.p.s. < PPS
- P.R.C. < PRC
- ps < PS
- Pahute < Paiute
- paki < Paki
- Pakstan < Pakistan
- Pakistanee < Pakistani
- Palaearctic < Palearctic
- Paleoamerican < Paleo-American
- Paleoindian < Paleo-Indian
- Palaeo-Indian < Paleo-Indian
- paleoindian < Paleo-Indian
- Palaeogene < Paleogene
- Palaeogenic < Paleogenic
- paleolithic < Paleolithic
- Palestinean < Palestinian
- Palestinean < Palestinian
- Pallas's cat < Pallas' cat
- Pallas cat < Pallas' cat
- Pallie < Pally
- Palmyrenean < Palmyrene
- Palmyrenean < Palmyrene
- panslavism < Pan-Slavism
- Pan-Theists < Pan-Theist
- Pangaea II < Pangaea Ultima
- Pangaea Proxima < Pangaea Ultima
- Pansclavic < Panslavic
- Pan-Slavic < Panslavic
- Pansclavist < Panslavist
- Panteleimon < Pantaleon
- panzerfaust < Panzerfaust
- paraclete < Paraclete
- Paretoan < Paretian
- Pareto-efficient < Pareto efficient
- Parlyament < Parliament
- paschal < Paschal
- pavlovian < Pavlovian
- Pearl Harbour < Pearl Harbor
- pecha-kucha < Pecha Kucha
- Peggie < Peggy
- Pisistratan < Peisistratan
- peke < Peke
- Peking robin < Pekin robin
- Pekin < Peking
- pelletron < Pelletron
- Peloponnesus < Peloponnese
- Penelopë < Penelope
- pentecostalist < Pentecostalist
- periecian < Perioecian
- perioikoi < Perioikoi
- Peripatetick < Peripatetic
- Persic < Persian
- Persic < Persian
- Persic < Persian
- Persianisation < Persianization
- Persianise < Persianize
- Peschito < Peshito
- Peshito < Peshitta
- Peshitto < Peshitta
- Peshawari < Peshwari
- Peshwari nan < Peshwari naan
- petri dish < Petri dish
- phalangist < Phalangist
- phanerozoic < Phanerozoic
- philippine < Philippine
- Phenician < Phoenician
- Phenician < Phoenician
- Phœnicopteridæ < Phoenicopteridae
- Phœnix < Phoenix
- Pecht < Pict
- pierrot < Pierrot
- pilates < Pilates
- Pitjantjara < Pitjantjatjara
- Planck constant < Planck's constant
- platonism < Platonism
- platonist < Platonist
- plough < Plough
- Plow Monday < Plough Monday
- 134340 Pluto < Pluto
- (134340) Pluto < Pluto
- Ponapean < Pohnpeian
- Ponapean < Pohnpeian
- Ponapean < Pohnpeian
- Ponapeian < Pohnpeian
- Ponapeian < Pohnpeian
- Ponapeian < Pohnpeian
- Pokemon Goer < Pokémon Goer
- pollyanna < Pollyanna
- Pollyanish < Pollyannish
- pollyannish < Pollyannish
- pomeranian < Pomeranian
- pomfret cake < Pontefract cake
- Pomptine < Pontine
- ponzi scam < Ponzi scam
- ponzi scams < Ponzi scam
- popemobile < Popemobile
- Portingall < Portugal
- Potter Stewart standard < Potter Stewart test
- Poznań < Poznan
- Pozhega < Požega
- Prairie < Prairies
- Priapos < Priapus
- Price's equation < Price equation
- pride < Pride
- Procrus < Procris
- proddy < Proddy
- Pyay < Prome
- prosecco < Prosecco
- Protestant ethic < Protestant work ethic
- Provencal < Provençal
- Provencial < Provençal
- Proosian < Prussian
- Prussianise < Prussianize
- Ipsariot < Psariot
- Ptolemæus < Ptolemaeus
- Panjabiness < Punjabiness
- Pauranic < Puranic
- Puseyistical < Puseyistic
- putonghua < Putonghua
- pygmalionism < Pygmalionism
- pythagorize < Pythagorize
- Pythium < Pythion
- pythoness < Pythoness
- Patzcuaro < Pátzcuaro
- q-word < Q-word
- Q.E.D. < [[QED}} (QED) {{gloss]]
- qallunaaq < Qallunaaq
- Carmatian < Qarmatian
- Karmatian < Qarmatian
- Kashkai < Qashqai
- kelipot < Qliphoth
- Qlipothic < Qliphothic
- Quashie < Quashee
- Québec < Quebec
- Kaybeck < Quebec
- Kichua < Quechua
- Quichuan < Quechuan
- Quichuan < Quechuan
- Queene < Queen
- question time < Question Time
- Quintile < Quintilis
- Koran-aloner < Quran-aloner
- Qur'anically < Quranically
- Koranist < Quranist
- Koranite < Quranite
- Qur'aniyun < Quraniyoon
- Qur'ân < Qur’an
- Québécoise < Québécois
- Quebecoise < Québécois
- Quebecoise < Québécoise
- R. < R
- R & D < R&D
- rapcon < RAPCON
- restful < RESTful
- rif < RIF
- ruok < RUOK
- Re < Ra
- Rachmaninovian < Rachmaninoffian
- Raday < Rade
- Ragnarök < Ragnarok
- Rajpoot < Rajput
- Ramazan < Ramadan
- Ramathan < Ramadan
- Rael < Raël
- Raelism < Raëlism
- Redshirt < Red Shirt
- Refsum disease < Refsum's disease
- rehoboam < Rehoboam
- Rheims < Reims
- remainer < Remainer
- renaissance < Renaissance
- Renascence < Renaissance
- Republic of Congo < Republic of the Congo
- Republocrat < Republicrat
- Restorationer < Restorationist
- Rev < Rev.
- Renard < Reynard
- Rhetian < Rhaetian
- rickey < Rickey
- riemannian < Riemannian
- rieslings < Rieslings
- Riehale < Righale
- rioja < Rioja
- Rovno < Rivne
- Robespierrian < Robespierrean
- rolandic < Rolandic
- rolodex < Rolodex
- Roman question < Roman Question
- Roman chamomile < Roman camomile
- romanisation < Romanisation
- romantic < Romantic
- Roma < Rome
- Rotty < Rottie
- rottweiler < Rottweiler
- Russignon < Roussillon
- Rs. < Rs
- Rooshian < Russian
- Roosian < Russian
- Russianisation < Russianization
- Russianise < Russianize
- russification < Russification
- russophobia < Russophobia
- Ruanda < Rwanda
- Rama < Rāma
- S & L < S&L
- S & M < S&M
- S. A. < S.A.
- S. A. < SA
- SASAE < SASE
- S.A.T. < SAT
- S. A. T. < SAT
- sd < SD
- sf < SF
- S. F. < SF
- S.F. < SF
- s-f < SF
- smh < SMH
- S.O.P. < SOP
- S.O.S. < SOS
- stem < STEM
- sumoylate < SUMOylate
- sumoylated < SUMOylated
- sumoylates < SUMOylates
- sumoylation < SUMOylation
- swag < SWAG
- Sabber-day < Sabba-day
- Shabbat < Sabbath
- Zabian < Sabian
- Zabism < Sabianism
- Zabaism < Sabianism
- Sabaeanism < Sabianism
- Zabianism < Sabianism
- Zabiism < Sabianism
- sabra < Sabra
- saddlebred < Saddlebred
- Sadian < Sadean
- Saadh < Sadh
- sahaba < Sahaba
- sahabah < Sahabah
- Shahaptian < Sahaptian
- St. Andrew's Day < Saint Andrew's Day
- St. Andrew's Cross < Saint Andrew's cross
- St. John < Saint John
- St John < Saint John
- St. Valentine's Day < Saint Valentine's Day
- Saint-Simonism < Saint-Simonianism
- Saïtic < Saitic
- Salonica < Salonika
- Zambo < Sambo
- Samiote < Samiot
- Samiote < Samiot
- Samoyede < Samoyed
- samoyed < Samoyed
- San José < San Jose
- San Jose < San José
- Sandzak < Sandžak
- Sunscrit < Sanskrit
- Sunskrit < Sanskrit
- Sanscritic < Sanskritic
- Santal < Santhal
- santyl < Santyl
- Sarazin < Saracen
- Saracenical < Saracenic
- Sartrian < Sartrean
- Sartrian < Sartrean
- Sasanid < Sassanid
- Sasanid < Sassanid
- satanism < Satanism
- satanist < Satanist
- saturnalian < Saturnalian
- saturnian < Saturnian
- saturnian < Saturnian
- savoy < Savoy
- Sawny < Sawney
- Sawny < Sawney
- sazerac < Sazerac
- Scandahoovian < Scandinavian
- Scandahoovian < Scandinavian
- Scaramouch < Scaramouche
- Skhimatarion < Schimatari
- Schleswig-Holstein question < Schleswig-Holstein Question
- Swerin < Schwerin
- scotch egg < Scotch egg
- Scotticise < Scotticize
- Scotify < Scottify
- Scotish < Scottish
- Scotch terrier < Scottish terrier
- scouser < Scouser
- scoucers < Scouser
- scoucer < Scouser
- secretary-general < Secretary General
- secretary general < Secretary General
- segway < Segway
- Selah < Sela
- Seljuqian < Seljukian
- Seljuqian < Seljukian
- Seljuckian < Seljukian
- Seljuckian < Seljukian
- Shemitism < Semitism
- sensurround < Sensurround
- sepharose < Sepharose
- Septembr < September
- Sirbonian < Serbonian
- serbophile < Serbophile
- serbophile < Serbophile
- Seereer < Serer
- sessrumnir < Sessrúmnir
- Sewanee < Sewannee
- Shensi < Shaanxi
- shabbat < Shabbat
- Shakspere < Shakespeare
- Shakspearian < Shakespearean
- Shakspearean < Shakespearean
- Shakespeariana < Shakespeareana
- Sakti < Shakti
- Shambala < Shambhala
- Shamballa < Shambhala
- Shangri-las < Shangri-Las
- Shannen < Shannon
- shastra < Shastra
- Shaykh < Sheikh
- Shum Chun < Shenzhen
- sherlock < Sherlock
- Sebat < Shevat
- Shiaism < Shi'ism
- Shi'itization < Shiitization
- Sinto < Shinto
- Sintu < Shinto
- Sintuism < Shintoism
- Sintoism < Shintoism
- Sintoist < Shintoist
- Sintuist < Shintoist
- Shekki < Shiqi
- shiraz < Shiraz
- Sivaistic < Shivaistic
- Shroftide < Shrovetide
- Sunga < Shunga
- Śuṅga < Shunga
- Sydwell < Sidwell
- Seekh < Sikh
- Sindi < Sindhi
- Singaporan < Singaporean
- Singaporan < Singaporean
- sinophobia < Sinophobia
- Si Sa Ket < Sisaket
- Skevington's daughter < Skeffington's daughter
- skidoo < Skidoo
- Skolemisation < Skolemization
- Scopie < Skopje
- Sclav < Slav
- Sclave < Slav
- Sclavic < Slavic
- Slavicist < Slavist
- Sclavonian < Slavonian
- Sclavonian < Slavonian
- Slobovia < Slobbovia
- Slovack < Slovak
- Slovack < Slovak
- Smoggie < Smoggy
- Smyrniote < Smyrniot
- Smyrniote < Smyrniot
- snicklefritz < Snicklefritz
- snuggie < Snuggie
- Sobranye < Sobranje
- Soqotra < Socotra
- Socotrine < Socotran
- Socotrine < Socotran
- Socratical < Socratic
- Solomonseal < Solomon's seal
- Somal < Somali
- son of God < Son of God
- Sung < Song
- Sofees < Sophy
- south pole < South Pole
- South East Asia < Southeast Asia
- South Ndebele < Southern Ndebele
- South Sami < Southern Sami
- southern belle < Southern belle
- southerner < Southerner
- southron < Southron
- Espanish < Spanish
- Spanish Flu < Spanish flu
- Spacva < Spačva
- Spetznaz < Spetsnaz
- sphynx < Sphynx
- spidey < Spidey
- Spider-sense < Spidey-sense
- Spider-Sense < Spidey-sense
- spider-sense < Spidey-sense
- Spinosism < Spinozism
- Spinozist < Spinozistic
- Spratlies < Spratlys
- squarial < Squarial
- St. < St
- Ignatius bean < St Ignatius' bean
- Saint Catharines < St. Catherines
- Saint-Louis < St. Louis
- St Martin's summer < St. Martin's summer
- Stakhonovite < Stakhanovite
- Sta. < [[Sta}} (Sta) {{qualifier]]
- Stevo < [[Steve}} (Steve) {{gloss]]
- Ste. < [[Ste}} (Ste) {{qualifier]]
- stilton < Stilton
- Stockholm effect < Stockholm syndrome
- Stolly < Stoli
- stone age < Stone Age
- Strangelovean < Strangelovian
- strombolian < Strombolian
- stryker < Stryker
- Stymphalia < Stymfalia
- Stymphalian < Stymfalian
- Stymphalian < Stymfalian
- Stix < Styx
- Soudan < Sudan
- Soudanese < Sudanese
- Suebic < Suevic
- sophi < Sufi
- Soofee < Sufi
- Sophi < Sufi
- sophism < Sufism
- Sofism < Sufism
- Soofeeism < Sufism
- Sufiism < Sufism
- Sukhum < Sukhumi
- Sumirian < Sumerian
- Sumirian < Sumerian
- Sunday motorist < Sunday driver
- Soonee < Sunni
- Sonnite < Sunnite
- Superbowl < Super Bowl
- superstitial < Superstitial
- suprematism < Suprematism
- Suppire < Supyire
- Supyire Senoufo < Supyire
- surgeon general < Surgeon General
- surgeon-general < Surgeon General
- Soochownese < Suzhounese
- Svekoman < Svecoman
- Sveta Nedjelja < Sveta Nedelja
- Swiss banks < Swiss bank accounts
- Swizzerland < Switzerland
- Sid < Syd
- sylvian < Sylvian
- syrette < Syrette
- Syrianise < Syrianize
- Syrophœnician < Syrophoenician
- Syrophœnician < Syrophoenician
- Sao Tomean < São Toméan
- Santomean < São Toméan
- T. < T
- tee-shirt < T-shirt
- Tardis < TARDIS
- tf < TF
- T.H.C. < THC
- T. H. C. < THC
- tracon < TRACON
- tv < TV
- tabasco < Tabasco
- Taizhong < Taichung
- Tadzhik < Tajik
- Tadzhik < Tajik
- Tadzhik < Tajik
- Tadjik < Tajik
- Tamul < Tamil
- Tamul < Tamil
- Tamul < Tamil
- Tana < Tanya
- Daoist < Taoist
- Tarasco < Tarascan
- Tarasco < Tarascan
- Tartary < Tartarus
- Tas < [[Tas.}} (Tas.) {{gloss]]
- Tartar < Tatar
- Taylour < Taylor
- Telemachean < Telemachian
- teletext < Teletext
- tellurian < Tellurian
- Teloogoo < Telugu
- Teloogoo < Telugu
- Ternopol < Ternopil
- terrestrial < Terrestrial
- Teutonise < Teutonize
- 42 < Texas 42
- Xanatos < Thanatos
- Thanksgivin' < Thanksgiving
- Thanksgivukah < Thanksgivukkah
- Theophrastan < Theophrastian
- Therapeutæ < Therapeutae
- Thimbu < Thimphu
- Thomaism < Thomism
- Thomsen's disease < Thomsen disease
- Thomean < Thomæan
- Thomaean < Thomæan
- Thoreau-esque < Thoreauesque
- Thrasymachan < Thrasymachian
- Thugee < Thuggee
- thuggeeism < Thuggism
- Fursday < Thursday
- Tian'anmen Square < Tiananmen Square
- Thibetan < Tibetan
- Thibetan < Tibetan
- Thibetian < Tibetan
- Thibetian < Tibetan
- Tigré < Tigre
- Tiruchchirappalli < Tiruchirappalli
- Tlinkit < Tlingit
- Tlinkit < Tlingit
- Tlinkit < Tlingit
- Tokharian < Tocharian
- Tokharian < Tocharian
- Tokharian < Tocharian
- Toga < Tonga
- Thorah < Torah
- Thorah < Torah
- tory < Tory
- tory < Tory
- Tourette's syndrome < Tourette syndrome
- tourettism < Tourettism
- transformer < Transformer
- Transdniestria < Transnistria
- Transdniestrian < Transnistrian
- Transdniestrian < Transnistrian
- traveller < Traveller
- triple goddess < Triple Goddess
- Trojan Horse < Trojan horse
- trokosi < Trokosi
- Trollopian < Trollopean
- Tropæolum < Tropaeolum
- tropicalia < Tropicália
- Donald Trumpian < Trumpian
- Trumpean < Trumpian
- Trump-mania < Trumpmania
- Trump mania < Trumpmania
- Tskhinval < Tskhinvali
- Tts. < Tts
- Tucsonan < Tucsonian
- Tucsonan < Tucsonian
- Tumushuke < Tumxuk
- tupperware < Tupperware
- Turkophilic < Turcophilic
- Turkophilism < Turcophilism
- Turkicisation < Turkicization
- Turkicise < Turkicize
- Turcism < Turkism
- twinkie < Twinkie
- twitter < Twitter
- twitterati < Twitterati
- twitterer < Twitterer
- tyndallization < Tyndallization
- Tyrtæan < Tyrtaean
- chachka < Tzatza
- U. < U
- U. < U
- U. < U
- ul < UL
- ul < UL
- U.P. < UP
- U. S. Virgin Islands < US Virgin Islands
- U.S. Virgin Islands < US Virgin Islands
- UTF16 < UTF-16
- UTF7 < UTF-7
- Ubyx < Ubykh
- Ukkers < Uckers
- Ukrainianisation < Ukrainianization
- underground railway < Underground Railroad
- universalism < Unitarian Universalism
- Unixlike < Unix-like
- uranian < Uranian
- Usherian < Ussherian
- Utsire < Utsira
- Usbek < Uzbek
- Usbeg < Uzbek
- Uzbeg < Uzbek
- Uzbeg < Uzbek
- Uzbeg < Uzbek
- Uzhgorod < Uzhhorod
- V. < V
- V-card < V card
- V. I. < V.I.
- vaxocentrism < VAXocentrism
- VCO2 < VCO₂
- V.I.P. < VIP
- VOX < VOx
- V. R. < VR
- veetol < VTOL
- VAR < VaR
- Vaisya < Vaishya
- Van Diemonian < Vandemonian
- Van Diemonian < Vandemonian
- vandyke < Vandyke
- Benares < Varanasi
- Varazhdin < Varaždin
- Vaidic < Vedic
- Fehmic < Vehmic
- velcro < Velcro
- velcro < Velcro
- veltliner < Veltliner
- Venitian < Venetian
- Venus fly trap < Venus flytrap
- verfremdungseffekt < Verfremdungseffekt
- vestan < Vestan
- 'Vette < Vette
- viagra < Viagra
- vicar of Christ < Vicar of Christ
- Vikky < Vicky
- Viangchan < Vientiane
- Wiangchan < Vientiane
- Vietnamisation < Vietnamization
- Vietnamise < Vietnamize
- Vilna < Vilnius
- Vinnitsa < Vinnytsia
- Vishakhapatnam < Visakhapatnam
- vizsla < Vizsla
- Voyvodina < Vojvodina
- W.A. < WA
- W. A. < WA
- wimp < WIMP
- W. O. < WO
- www < WWW
- Wysiwyg < WYSIWYG
- Wahabee < Wahhabi
- Wahconda < Wakanda
- Waconda < Wakanda
- Valdenses < Waldenses
- Weatherby brow < Weatherby eyebrow
- web < Web
- Wed < Wed.
- Wendsday < Wednesday
- Wensday < Wednesday
- Weedgie < Weegie
- wellington < Wellington
- Welsh Sheep Dog < Welsh Sheepdog
- Welchman < Welshman
- Wamba-Wamba < Wemba-Wemba
- Wamba Wamba < Wemba-Wemba
- West Azarbaijan < West Azerbaijan
- West Carolina < Western Carolina
- Western Dwina < Western Dvina
- western hemisphere < Western Hemisphere
- Whitefriar < White Friar
- Whitson < Whitsun
- Whoosis < Whosis
- wi-fi < Wi-Fi
- Woiworung < Woiwurrung
- Woiwurrong < Woiwurrung
- Wuywurung < Woiwurrung
- Wonderwoman < Wonder Woman
- World War One < World War I
- World War Two < World War II
- World War Three < World War III
- wunderkammer < Wunderkammer
- Wuhsi < Wuxi
- wyandotte < Wyandotte
- Wyclifite < Wycliffite
- Wickliffite < Wycliffite
- W5 < [[W⁵}} (W⁵) {{gloss]]
- x < X
- X. < X
- X-factor < X factor
- x-ray < X-ray
- Xray < X-ray
- x-ray vision < X-ray vision
- CUV < [[XUV}} (XUV) {{gloss]]
- xanthochroi < Xanthochroi
- Xemu < Xenu
- Xosa < Xhosa
- Si-hia < Xi Xia
- Sinkiang < Xinjiang
- Xingjiang < Xinjiang
- Xstmas < Xmas
- Y. < Y
- YHVH < YHWH
- JHVH < YHWH
- IHVH < YHWH
- JHWH < YHWH
- Yagi antenna < Yagi-Uda antenna
- Yakoot < Yakut
- Yakoot < Yakut
- Jumna < Yamuna
- Yangtse < Yangtze
- Yaounde < Yaoundé
- Yasmeena < Yasmina
- Jamnia < Yavne
- Yavneh < Yavne
- Ygdrasyl < Yggdrasil
- yngling < Yngling
- yooper < Yooper
- Yorke < York
- Yucatan < Yucatán
- Yukon Time < Yukon Standard Time
- yule < Yule
- yuletide < Yuletide
- Uwaine < Ywain
- Zabaleen < Zabbaleen
- Zacchæus < Zaccheus
- Dhahiri < Zahiri
- Thahiri < Zahiri
- Zinj < Zanj
- Zapatism < Zapatismo
- Zaporozhye < Zaporizhia
- Zarathushtra < Zarathustra
- Zarathustran < Zarathustrian
- Zarathustran < Zarathustrian
- Zain < Zayn
- zenlike < Zenlike
- Zenoist < Zenonist
- Zenoist < Zenonist
- zeppelin < Zeppelin
- Ze'ev < Zev
- Chiangchew < Zhangzhou
- Chefoo < Zhifu
- Chung-tu < Zhongdu
- Chou < Zhou
- Chow < Zhou
- zimmer frame < Zimmer frame
- zionist < Zionist
- ziplock < Ziploc
- Zarathustrism < Zoroastrianism
- ZULU time < Zulu time
- Z time < Zulu time
- Zuinglian < Zwinglian
- Zuinglian < Zwinglian
- Zuinglianism < Zwinglianism
- Zyklon-B < Zyklon B