Synonyms of 'abortive'

barren, bootless, failing, fruitless, futile, gainless, immature, ineffective, ineffectual, inefficacious, lame, manque, otiose, sterile, stickit, stillborn, unavailable, unavailing, unformed, unfortunate, unmatured, unproductive, unprofitable, unremunerative, unrewarding, unripe, unsuccessful, useless, vain