denigration vs aspersion

denigration and aspersion both are nouns.

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

As nouns, denigration and aspersion are synonyms defined as:

denigration and aspersion: an abusive attack on a person's character or good name

Other synonyms of denigration include calumny, defamation, slander.

denigration (noun)	aspersion (noun)
the act of expressing disapproval (especially of yourself)	an abusive attack on a person's character or good name
an abusive attack on a person's character or good name	the act of sprinkling water in baptism (rare)
a belittling comment	a disparaging remark