reproach vs accuse

reproach is a noun but accuse is not a noun.

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

As verbs, accuse is a hypernym of reproach; that is, accuse is a word with a broader meaning than reproach:

Other hypernyms of reproach include criminate, impeach, incriminate.

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

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