1.  bear witness(v = verb.communication) evidence, prove, show, testify - provide evidence for; "The blood test showed that he was the father"; "Her behavior testified to her incompetence"
is one way to inform
Sample sentences: Somebody ----s something; Something ----s something; Somebody ----s PP; Somebody ----s that CLAUSE

2.  bear witness(v = verb.communication) attest, take the stand, testify - give testimony in a court of law;
is one way to declare
Sample sentences: Somebody ----s

VB  be evidence, evince, show, betoken, tell of, indicate, imply, involve, argue, bespeak, breathe, have weight, carry weight, tell, speak volumes, speak for itself, rest upon, depend upon, repose on, bear witness, give evidence, testify, depose, witness, vouch for, sign, seal, undersign, set one's hand and seal, sign and seal, deliver as one's act and deed, certify, attest, acknowledge, make absolute, confirm, prove (demonstrate), indorse, countersign, corroborate, support, ratify, bear out, uphold, warrant, adduce, attest, cite, quote, refer to, appeal to, call, call to witness, bring forward, bring into court, allege, plead, produce witnesses, confront witnesses, place into evidence, mark into evidence, collect evidence, bring together evidence, rake up evidence, experiment, have a case, make out a case, establish, authenticate, substantiate, verify, make good, quote chapter and verse, bring home to, bring to book.

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