mitigate vs mitigation

mitigate is not a noun while mitigation is a noun.

Word	Noun	Adjective	Verb	Adverb
mitigate	No	No	Yes	No
mitigation	Yes	No	No	No

mitigate (noun)	mitigation (noun)
	to act in such a way as to cause an offense to seem less serious
	the action of lessening in severity or intensity
	a partial excuse to mitigate censure; an attempt to represent an offense as less serious than it appears by showing mitigating circumstances

mitigate (verb)	mitigation (verb)
to temper
lessen or to try to lessen the seriousness or extent of