denigrate vs denigration

denigrate is not a noun while denigration is a noun.

Word	Noun	Adjective	Verb	Adverb
denigrate	No	No	Yes	No
denigration	Yes	No	No	No

denigrate (noun)	denigration (noun)
	the act of expressing disapproval (especially of yourself)
	an abusive attack on a person's character or good name
	a belittling comment

denigrate (verb)	denigration (verb)
cause to seem less serious; play down
charge falsely or with malicious intent; attack the good name and reputation of someone