confirmative
1. [ adjective ] serving to support or corroborate
Synonyms: confirming confirmatory corroborative corroboratory substantiating substantiative validating validatory verificatory verifying collateral
Examples:

"collateral evidence"

Related terms: supportive
Similar spelling:   confirmation
  confirmable
  confirmed
  confirmatory
  conformation
  confrontation
  confirming
  comforting
  confronting
  confrontational
  conformance
  conformable
  comfortingly
  comfortable