The DICT Development Group

  bear witness
      v 1: provide evidence for; "The blood test showed that he was
           the father"; "Her behavior testified to her incompetence"
           [syn: testify, bear witness, prove, evidence,
           show]
      2: give testimony in a court of law [syn: testify, attest,
         take the stand, bear witness]

  18 Moby Thesaurus words for "bear witness":
     acknowledge, affirm, allege, asseverate, attest, aver, avouch,
     avow, certify, depone, depose, disclose, give evidence, swear,
     testify, vouch, warrant, witness