Synonyms:
collateral, confirmative, confirming, confirmatory, corroborative, corroboratory, substantiating, substantiative, validating, validatory, verificatory, verifying
Meaning: serving to support or corroborate; "collateral evidence"
Usage examples
Thus with regard to the resurrection of Jesus, as Mr. Hutton adduced what he thought confirmatory evidence only from the New Testament itself, I confined myself to showing or attempting to show that such evidence is unsubstantial.