affirm vs verify

affirm and verify both are verbs.

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

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

Other hyponyms of affirm include back, back up, vouch, demonstrate, establish, prove, shew, show, document, validate.

As verbs, affirm and verify are synonyms defined as:

Other synonyms of affirm include assert, aver, avow, swan, swear.

affirm (verb)	verify (verb)
establish or strengthen as with new evidence or facts	confirm the truth of
to declare or affirm solemnly and formally as true	to declare or affirm solemnly and formally as true
say yes to	attach or append a legal verification to (a pleading or petition)
	check or regulate (a scientific experiment) by conducting a parallel experiment or comparing with another standard