profitless, exhausted, delusive, worthless, frivolous, uneffective, dizzy, puerile, purposeless, swollen, otiose, pathetic, unsatisfying, lazy, sleeveless, light-minded, indolent, yeasty, defective, work-shy, trifling, frothy, unreal, inefficacious, inconstant, unneeded, superfluous, fruitful, shadowy, light-headed, birdbrained, unproductive, goofy, hopeless, hollow, deceitful, swollen-headed, egotistical, scatterbrained, faineant, silly, unsatisfactory, small, petty, empty, vapid, nugatory, idle, slothful, unavailing, egotistic, used, flighty, featherbrained, null, trivial, baseless, unable, unsubstantial, unprofitable, effective, ditzy, valueless, senseless, conceited, unimportant, barren, bootless, thrive, faulty, harebrained, in vain, wasted, impracticable, inefficient, self-conceited, visionary
unsuccessful (part of speech: adjective)
useless (part of speech: adjective)
- I told him I, with all my money and everything, was vacant, empty, futile! - "The Air Trust", George Allan England.
- My own experience in life had been even more futile. - "The Portal of Dreams", Charles Neville Buck.
- Only, somehow, after the large dreams and hopes of the early days, to come down to this perpetual campaign of petty law- breaking, and futile outrage, to these odious meetings and shrieking newspapers, was to be- well, discouraged! - "Delia Blanchflower", Mrs. Humphry Ward.