What is another word for "gratis"?

Roget's Thesaurus (1911) lists these synonyms for "gratis": account, admission, and, application, apply, arrear, bank, bankrupt, bankruptcy, bargain, become, behind, behindhand, bogus, bon, both, break, button, buy, catchpenny, charge, cheap, cheapness, check, cheque, come, cost, costless, deadhead, debt, debtor, defalcation, default, defaulter, depreciation, dirt, dishonor, dog, down, draw.