adjective
alone, singular
Synonyms: different, exclusive, individual, lone, one, one and only, onliest, only, particular, rare, separate, single, solitary, solo, sui generis, uncommon, unexampled
Antonyms: common, commonplace, normal, usual
adjective
one-of-a-kind; without equal
Synonyms: anomalous, best, exceptional, extraordinary, far-out, incomparable, inimitable, matchless, most, nonpareil, novel, only, peerless, primo, rare, singular, something else, special, standout, strange, uncommon, unequaled, unexampled, unimaginable, unmatched, unparagoned, unparalleled, unprecedented, unreal, unrivaled, utmost, weird
Antonyms: like, similar, standard, trite