protest vs aver

protest is a noun but aver is not a noun.

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

As verbs, aver is a hypernym of protest; that is, aver is a word with a broader meaning than protest:

Other hypernyms of protest include affirm, assert, avow, swan, swear, verify.

protest (noun)	aver (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

protest (verb)	aver (verb)
utter words of protest	to declare or affirm solemnly and formally as true
affirm or avow formally or solemnly	report or maintain
express opposition through action or words