accuse vs reproach

accuse is not a noun while reproach is a noun.

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

As verbs, reproach is a hyponym of accuse; that is, reproach is a word with a more specific, narrower meaning than accuse:

Other hyponyms of accuse include upbraid, arraign, recriminate, charge, file, lodge.

accuse (noun)	reproach (noun)
	a mild rebuke or criticism
	disgrace or shame

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