greenbacks ( synonym found)
Definition of greenbacks:

(n) : any bill that is legal tender in the US (originally printed with green and black ink) issued by the Federal Reserve; a unit of American currency issued during the Civil War by the Treasury Department
Definition of greenbacks:

(n) : any bill that is legal tender in the US (originally printed with green and black ink) issued by the Federal Reserve; a unit of American currency issued during the Civil War by the Treasury Department
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