User:Torgo~enwiktionary/sandbox

pneumonoultramicroscopicsilicovolcanoconiosis

pathological 12
nonexistent 12
ephemeral 9
unheard-of 9
morbid 6
onerous 7
nonroprietary 14
odious 6
unsavory 8
lugubrious 10
terrible 8
rapacious 9
adventitious (as in not congenital) 12
minacious 9
invented 8
cognizable 10
respiratory 11
obscure 7
sinister 8
colourless 10
observable 10
pernicious 10
interesting 11
concocted 9
sordid 6
inimical 8
life-threatening 15
injurious 9
contractible 12
otiose (in sense 3.) 6
venefic 7
obstructive 11
lousy 5
crumby 6
abacterial 10
neologistic 11
original umm.... in sense 2. (getting desperate here) 8
confirmable... in principle, yeah 11
ostrobogulous... yup 13
nominal 7
inimicitious 12
overwrought 11
sesquipedalian 14
intangible 10
supercalifragilisticexpialidocious!!!! woohoo! 34

45 * (450/45) = 450

As you can see, I have taken the liberty of using adjectives to describe both the noun referent, and the noun itself (e.g. neologistic, sesquipedalian, overwrought, supercalifragilisticexpialidocious, etc.) since this was an ambiguity in the instructions.  ;-)