avow vs protest

avow is not a noun while protest is a noun.

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

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

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

avow (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

avow (verb)	protest (verb)
to declare or affirm solemnly and formally as true	utter words of protest
admit openly and bluntly; make no bones about	affirm or avow formally or solemnly
	express opposition through action or words