bear witness vs declare

bear witness and declare both are verbs.

Word	Noun	Adjective	Verb	Adverb
bear witness	No	No	Yes	No
declare	No	No	Yes	No

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

bear witness (verb)	declare (verb)
give testimony in a court of law	state emphatically and authoritatively
provide evidence for	state firmly
	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