confirming Synonyms

positive corroborative confirmatory confirmative collateral substantiating verifying verificatory corroboratory validating validatory substantiative reaffirm ratify ratifying prove demonstrating proving positivist supportive reassert sanctioning stating substantiate supporting support validate verify confirms establishing attesting assert asserting assenting ascertaining affirmatory affirmative affirmation affirm affirming authenticating authorizing endorsing approving corroborate corroborating consenting confirmer confirmation confirm