affirm vs confirm

affirm and confirm both are verbs.

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

As verbs, affirm and confirm are synonyms defined as:

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

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

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

Other hyponyms of affirm include claim, reaffirm, reassert, defend, maintain.

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