extenuation vs extenuate

extenuation is a noun but extenuate is not a noun.

Word	Noun	Adjective	Verb	Adverb
extenuation	Yes	No	No	No
extenuate	No	No	Yes	No

extenuation (noun)	extenuate (noun)
to act in such a way as to cause an offense to seem less serious
a partial excuse to mitigate censure; an attempt to represent an offense as less serious than it appears by showing mitigating circumstances

extenuation (verb)	extenuate (verb)
	lessen or to try to lessen the seriousness or extent of