confirm vs affirm

confirm and affirm both are verbs.

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

As verbs, confirm and affirm are synonyms defined as:

confirm and affirm: establish or strengthen as with new evidence or facts

Other synonyms of confirm include corroborate, substantiate, support, sustain.

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

confirm (verb)	affirm (verb)
make more firm	establish or strengthen as with new evidence or facts
establish or strengthen as with new evidence or facts	to declare or affirm solemnly and formally as true
strengthen or make more firm	say yes to
administer the rite of confirmation to
support a person for a position