accuse vs accusation

accuse is not a noun while accusation is a noun.

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

accuse (noun)	accusation (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

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