substantiate


substantiate (http://definr.com/substantiate)

     v 1: establish or strengthen as with new evidence or facts; "his
          story confirmed my doubts"; "The evidence supports the
          defendant" [syn: confirm, corroborate, sustain, support,
           affirm] [ant: negate]
     2:  establish as valid or genuine; "Can you substantiate your
        claims?" [syn: back, back up]