What is another word for "rebate"?

Roget's Thesaurus (1911) lists these synonyms for "rebate": abate, abatement, agio, allow, allowance, and, backwardation, bargain, bate, below, business, concession, contango, coupon, depreciation, discount, double, down, drawback, friend, give, half, have, make, mark, off, par, percentage, poundage, price, qualification, rebatement, reduce, reduction, sale, salvage, set-off, store, take, tare.