Thesaurus:impromptu

Thesaurus

impromptu

English

Adjective

Sense: carried out with no preparation

Synonyms

• ad lib
• extemporal
• extemporary
• extemporaneous
• extempore
• extemporized
• impromptu
• improvised
• improviso
• off-the-cuff
• offhand
• spur-of-the-moment

Various

• designless
• undesigned
• unscheduled
• unplanned
• unpremeditated
• unrehearsed
• unscripted
• spontaneous
• unprepared
• casual
• improvisatorial
• improvisatory
•   —
• throwaway
• makeshift
• make-do
• jury-rigged
• stopgap

Further reading

• “674. nonpreparation” in Roget's Thesaurus, T. Y. Crowell Co., 1911.
• “impromptu” in Moby Thesaurus II, Grady Ward, 1996.
• some of the synonyms at the Google Books Ngram Viewer.