Back money is a term used to describe the process of recovering money that has been spent or lost. The two crossword solutions for this term are RECOUP and REBATE. RECOUP is a verb meaning to regain or recover something, usually money, that has been lost or spent. REBATE is a noun meaning a partial refund of an amount paid or a reduction in the cost of something. Both terms can be used to describe the process of getting back money that has been spent or lost.