costless

• POS: Adjective
• HYPHEN: cost=less

CIDE DICTIONARY

costless, a. 

 Costing nothing.  [1913 Webster]

ROGET THESAURUS

costless

Cheapness

N cheapness, low price, depreciation, bargain, good penny worth, snap, gratuity, free quarters, free seats, free admission, pass, free pass, free warren, give-away, freebee, run of one's teeth, nominal price, peppercorn rent, labor of love, drug in the market, deadhead, cheap, low, low priced, moderate, reasonable, inexpensive, unexpensive, well worth the money, worth the money, magnifique et pas cher, good at the price, cheap at the price, dirt cheap, dog cheap, cheap, cheap as dirt, cheap and nasty, catchpenny, discounted, half-price, depreciated, unsalable, gratuitous, gratis, free, for nothing, costless, expenseless, without charge, not charged, untaxed, scotfree, shotfree, rent-free, free of cost, free of expense, honorary, unbought, unpaid, for a mere song, for a song, at cost, at cost price, at prime cost, at a reduction, a bon marche.