collateral

Occurring with or following as a consequence.

“collateral target damage from a bombing run”

Descended from a common ancestor but through different lines.

“cousins are collateral relatives”

Serving to support or corroborate.

“collateral evidence”

Additional but secondary; auxiliary.

Situated or running side by side.

“collateral ridges of mountains”

A security pledged for the repayment of a loan.