Synonyms and related words :
exceptional, extraordinary, fabulous, incommunicable, indefinable, ineffable, inenarrable, inexpressible, innominable, legendary, marvelous, mythical, noncommunicable, noteworthy, phenomenal, portentous, prodigious, remarkable, stupefying, stupendous, undefinable, unexampled, unmentionable, unnameable, unparalleled, unprecedented, unspeakable, untellable, unutterable, unwhisperable, wonderful