affirm vs protest

affirm is not a noun while protest is a noun.

Word	Noun	Adjective	Verb	Adverb
affirm	No	No	Yes	No
protest	Yes	No	Yes	No

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

Other hyponyms of affirm include hold, claim, take, attest, declare, assure, tell.

affirm (noun)	protest (noun)
	the act of protesting; a public (often organized) manifestation of dissent
	a formal and solemn declaration of objection
	the act of making a strong public expression of disagreement and disapproval

affirm (verb)	protest (verb)
establish or strengthen as with new evidence or facts	utter words of protest
to declare or affirm solemnly and formally as true	affirm or avow formally or solemnly
say yes to	express opposition through action or words