evidence vs bear witness

evidence is a noun but bear witness is not a noun.

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

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

evidence: provide evidence for; stand as proof of; show by one's behavior, attitude, or external attributes
bear witness: provide evidence for

Other hypernyms of evidence include evidence, prove, show, testify.

As verbs, evidence and bear witness are synonyms defined as:

Other synonyms of evidence include prove, show, testify.

evidence (noun)	bear witness (noun)
your basis for belief or disbelief; knowledge on which to base belief
(law) all the means by which any alleged matter of fact whose truth is investigated at judicial trial is established or disproved
an indication that makes something evident

evidence (verb)	bear witness (verb)
provide evidence for; stand as proof of; show by one's behavior, attitude, or external attributes	give testimony in a court of law
provide evidence for	provide evidence for
give evidence