42 synonyms for useless such as hopeless, sisyphean, bad, and bum. Useless is an adjective, and its antonyms are useful and beneficial.
Sisyphean, bootless, broken, fruitless, futile, hopeless, impotent, impractical, in vain, ineffectual, inefficacious, inutile, junky, kaput, nugatory, pointless, profitless, purposeless, to no avail, to no purpose, unachievable, unavailing, unproductive, unprofitable, unserviceable, unusable, unworkable, and vain.
A dead loss, bad, bum, hopeless, inadequate, incapable, incompetent, ineffective, ineffectual, inept, no good, weak, and worthless.