collateral
col-lat-er-al
noun
An asset pledged as security for a loan or debt.
"They used their house as collateral for the loan."
adjective
Occurring as a secondary consequence, often unintended or indirect.
"The war resulted in much collateral damage."
Thesaurus
Synonyms: validatory, validating, substantiative, verificatory, confirmative, verifying, supportive, confirmatory, corroborative, corroboratory, substantiating, confirming