avowal vs reassertion

avowal and reassertion both are nouns.

Word	Noun	Adjective	Verb	Adverb
avowal	Yes	No	No	No
reassertion	Yes	No	No	No

As nouns, reassertion is a hyponym of avowal; that is, reassertion is a word with a more specific, narrower meaning than avowal:

Other hyponyms of avowal include reaffirmation, professing, profession, affirmative.

avowal (noun)	reassertion (noun)
a statement asserting the existence or the truth of something	renewed affirmation