Synonyms and related words :
abortive, barren, bootless, deleterious, detrimental, disadvantageous, disserviceable, fruitless, futile, gainless, harmful, ineffective, inefficient, injurious, losing, nonremunerative, otiose, pointless, prejudicial, profitless, purposeless, rewardless, sterile, unadvantageous, unavailing, unfavorable, unfruitful, unproductive, unremunerative, unrewarding, useless, worthless