Synonyms and related words :
abortive, aimless, barren, bootless, counterproductive, effete, empty, etiolated, fatuitous, fatuous, feckless, fruitless, futile, impotent, inadequate, inane, ineffective, ineffectual, inefficacious, inoperative, invalid, meaningless, no go, nugacious, nugatory, of no force, of no use, pointless, purposeless, sterile, superfluous, unavailable, unproductive, useless, vain