verify vs affirm

verify and affirm both are verbs.

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

As verbs, affirm is a hypernym of verify; that is, affirm is a word with a broader meaning than verify:

Other hypernyms of verify include confirm, corroborate, substantiate, support, sustain.

As verbs, verify and affirm are synonyms defined as:

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

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