Confirms rhymes with:
affirms, firm's, firms, firms', reaffirms, affirms, berms, firm's, firms, firms', germs, herms, reaffirms, sperms, squirms, term's, terms, worm's, worms
Confirms sounds like:
cambrian's, comparing, compromise, compromises, conference, conference's, conferences, conferring, confirming, conformance, conforming, conforms