accuser vs accuse

accuser is a noun but accuse is not a noun.

Word	Noun	Adjective	Verb	Adverb
accuser	Yes	No	No	No
accuse	No	No	Yes	No

accuser (noun)	accuse (noun)
someone who imputes guilt or blame

accuser (verb)	accuse (verb)
	bring an accusation against; level a charge against
	blame for, make a claim of wrongdoing or misbehavior against