Synonyms and related words :
abortive, barren, counterproductive, effete, empty, etiolated, failed, failing, fatuitous, fatuous, feckless, fruitless, frustrating, futile, gainless, inadequate, inane, ineffective, ineffectual, inefficacious, inoperative, invalid, lame, manque, miscarried, miscarrying, nonremunerative, nugacious, nugatory, of no effect, of no force, otiose, pointless, profitless, purposeless, rewardless, sterile, stickit, stillborn, successless, unavailable, unavailing, unfortunate, unproductive, unprofitable, unremunerative, unrewarding, unsuccessful, useless, vain, wasteful, worthless,