affirm vs declare

affirm and declare both are verbs.

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

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

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

Other hyponyms of affirm include hold, claim, take, attest, protest, assure, tell.

affirm (verb)	declare (verb)
establish or strengthen as with new evidence or facts	state emphatically and authoritatively
to declare or affirm solemnly and formally as true	state firmly
say yes to	make a declaration (of dutiable goods) to a customs official
	declare to be
	announce publicly or officially
	proclaim one's support, sympathy, or opinion for or against
	designate (a trump suit or no-trump) with the final bid of a hand
	authorize payments of