Synonyms of unsuccessful

1 Syllable
vain
2 Syllables
thwarted, doomed, failing, foiled, failed, losing, idlest, fruitless
3 Syllables
nonprofit, resultless, forceless, useless, futile, unthriving, ill-fated, unlucky, slack-spined, disastrous, defeated
4 Syllables
abortive, unavailing, unratified, ineffectual, defeasible
5 Syllables
invertebrate, infelicitous, unprofitable, unenforceable, ineffective, anticlimactic, unlucrative, inefficacious, unfortunate
7 Syllables
unremunerative