accentuate vs accentuation

accentuate is not a noun while accentuation is a noun.

Word	Noun	Adjective	Verb	Adverb
accentuate	No	No	Yes	No
accentuation	Yes	No	No	No

accentuate (noun)	accentuation (noun)
	the act of giving special importance or significance to something
	the use or application of an accent; the relative prominence of syllables in a phrase or utterance

accentuate (verb)	accentuation (verb)
to stress, single out as important
put stress on; utter with an accent