What is another word for "gratuitous"?

Roget's Thesaurus (1911) lists these synonyms for "gratuitous": admission, and, bargain, bon, buy, catchpenny, charge, cheap, cheapness, come, cost, costless, deadhead, depreciation, dirt, dog, down, drug, expense, expenseless, fall, for, free, good, gratis, gratuity, have, honorary, inexpensive, labor, little, love, low, market, mere, moderate, money, nasty, nominal, not.