bear witness vs adduce

bear witness and adduce both are verbs.

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

As verbs, adduce is a hyponym of bear witness; that is, adduce is a word with a more specific, narrower meaning than bear witness:

Other hyponyms of bear witness include attest, certify, demonstrate, evidence, manifest, presume, abduce, cite.

bear witness (verb)	adduce (verb)
give testimony in a court of law	advance evidence for
provide evidence for