collateral - noun

a security pledged for the repayment of a loan

collateral - adjective

• descended from a common ancestor but through different lines
• serving to support or corroborate
• accompany, concomitant
• situated or running side by side

collateral - thesaurus

confirmative   confirmatory   confirming   corroborative   corroboratory   indirect   substantiating   substantiative   validating   validatory   verificatory   verifying