Antonyms of adj unsuccessful

2 senses of unsuccessful

Sense 1
unsuccessful (vs. successful) -- (not successful; having failed or having an unfavorable outcome)

successful (vs. unsuccessful) -- (having succeeded or being marked by a favorable outcome; "a successful architect"; "a successful business venture")
        => boffo -- (resoundingly successful and popular; "for years he was a boffo box office certainty")
        => booming, flourishing, palmy, prospering, prosperous, roaring, thriving -- (very lively and profitable; "flourishing businesses"; "a palmy time for stockbrokers"; "a prosperous new business"; "doing a roaring trade"; "a thriving tourist center"; "did a thriving business in orchids")
        => in (predicate) -- (holding office; "the in party")
        => made -- (successful or assured of success; "now I am a made man forever"- Christopher Marlowe)
        => no-hit -- (of a game (or the pitching) in which a pitcher allows the opponent no hits; "a no-hit pitcher"; "a no-hit game")
        => productive -- (yielding positive results)
        => self-made -- (having achieved success or recognition by your own efforts; "a self-made millionaire")
        => sure-fire -- (certain to be successful; "a sure-fire way to get rich")
        => triple-crown -- (unofficial championship title for player who heads the league in batting average and home runs and runs batted in)
        => triple-crown -- (of a horse that has won the Kentucky Derby and the Belmont Stakes and the Preakness races)
        => victorious, winning -- (having won; "the victorious entry"; "the winning team")

Sense 2
abortive, stillborn, unsuccessful -- (failing to accomplish an intended result; "an abortive revolt"; "a stillborn plot to assassinate the President")

INDIRECT (VIA unfruitful) -> fruitful -- (productive or conducive to producing in abundance; "be fruitful and multiply")

Similarity of adj unsuccessful

2 senses of unsuccessful

Sense 1
unsuccessful (vs. successful) -- (not successful; having failed or having an unfavorable outcome)
       => attempted -- (tried unsuccessfully; "attempted murder")
       => defeated, disappointed, discomfited, foiled, frustrated, thwarted -- (disappointingly unsuccessful; "disappointed expectations and thwarted ambitions"; "their foiled attempt to capture Calais"; "many frustrated poets end as pipe-smoking teachers"; "his best efforts were thwarted")
       => done for (predicate), ruined, sunk, undone, washed-up -- (doomed to extinction)
       => down-and-out -- (lacking resources (or any prospect of resources))
       => empty-handed, unrewarded -- (having acquired or gained nothing; "the returned from the negotiations empty-handed")
       => hitless -- ((of a batter) without a hit; "he went hitless for three innings")
       => no-win -- (certain to end in failure and disappointment; "a no-win situation")
       => out (prenominal) -- (out of power; especially having been unsuccessful in an election; "now the Democrats are out")
       => scoreless, goalless, hitless -- (having no points scores; "a scoreless inning")
       => self-defeating -- (acting to defeat its own purpose; "it is self-defeating...to ignore the progress of events")
       => unfulfilled, unrealized, unrealised -- (of persons; marked by failure to realize full potentialities; "unfulfilled and uneasy men"; "unrealized dreams and ambitions")
       => unplaced -- (not one of the first three in a race or competition)
       => winless -- (having no wins; "the team had a very disappointing winless season")
          Also See-> defeated#1; unfortunate#1; unprofitable#1

Sense 2
abortive, stillborn, unsuccessful -- (failing to accomplish an intended result; "an abortive revolt"; "a stillborn plot to assassinate the President")
       => unfruitful (vs. fruitful) -- (not fruitful; not conducive to abundant production)