Synonyms of oblivious

1 Syllable
gone, lax, deaf, rapt, blind
2 Syllables
spacey, dreamy, zonked, laxer, absent, heedless, nescient, purblind
3 Syllables
unstudious, wrapped-up, distracted, ignorant, amnesic, forgetting, forgetful, regardless, unhearing, neglectful, absentee, blundering, unwitting, unbriefed, airheaded, unmindful, unthinking, absorbed, unconscious, nirvanic, inconscient, careless, abstracted, negligent, unwatchful, unknowing, preoccupied
4 Syllables
woolgathering, unfamiliar, unbothered, nonspecific, unscholarly, uninformed, uninstructed, insensible, unaware, overlooking, absentminded, unacquainted, unnoticing, ungrateful, incognizant, inconversant, amnemonic, unconcerned, undiscerning, unobserving, unperceiving, absent-minded, disregardful, unobservant
5 Syllables
unknowledgeable, unperceptive, unrecognizing, uncomprehending, unintellectual, inattentive, pococurante, imperceivable