corroborate in WordNet English dictionary

1. establish or strengthen as with new evidence or facts
   "his story confirmed my doubts"; "The evidence supports the defendant"
   confirm  corroborate  sustain  substantiate  support  affirm 
   
2. support with evidence or authority or make more certain or confirm
   "The stories and claims were born out by the evidence"
   corroborate  underpin  bear out  support 
   
3. give evidence for
   validate  corroborate