accusation vs accuse

accusation is a noun but accuse is not a noun.

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

accusation (noun)	accuse (noun)
a formal charge of wrongdoing brought against a person; the act of imputing blame or guilt
an assertion that someone is guilty of a fault or offence

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