Synonyms and related words :
abortive, aimless, barren, bootless, counterproductive, deleterious, detrimental, disadvantageous, disserviceable, effete, empty, etiolated, failed, failing, fatuitous, fatuous, feckless, fruitless, fustian, futile, good-for-nothing, harmful, hopeless, idle, impotent, impracticable, impractical, inadequate, inane, incompetent, ineffective, ineffectual, inefficacious, inefficient, inept, injurious, inoperative, inutile, invalid, lame, manque, meaningless, miscarried, miscarrying, no go, nonfunctional, nugacious, nugatory, of no effect, of no force, of no use, pointless, prejudicial, purposeless, sterile, stickit, stillborn, successless, superfluous, unadvantageous, unavailable, unavailing, unfavorable, unfortunate, unpractical, unproductive, unprofitable, unpurposed, unrewarding, unserviceable, unsuccessful, unusable, unworkable, vain, worthless