Synonyms of inattentive

1 Syllable

blind, lost, rapt

2 Syllables

vague, bored, thoughtless, sloppy, musing, heedless, off-guard, discinct, lazy, distraught, laziest, sloppier, quick-fix, lazier, remiss, slothful, stoical, mopish, dreamy, absent, shiftless, listless, purblind, mindless, reckless, distrait

3 Syllables

distracted, diverted, unthoughtful, hot-headed, neglectful, unthinking, defaultant, nirvanic, negligent, unsocial, asocial, unbriefed, unwatchful, unknowing, smattery, unheeding, unmindful, unconscious, unready, flatfooted, abstracted, birdbrained, amnesic, regardless, forgetful, slow-moving, nitwitted, removed, oblivious, spaced-out, faraway, careless, airheaded, bemused, inconscient, preoccupied

4 Syllables

woolgathering, perfunctory, directionless, apathetic, devil-may-care, amnemonic, unconcerned, inobservant, unobserving, unperceiving, uninformed, nonobservant, absentminded, unnoticing, unaroused, unimpressed, unbothered, inadvertent, energyless, unambitious, lamebrained, unindustrious, unaware, indifferent, superficial, undiscerning, impercipient, absent-minded, unobservant, scatterbrained

5 Syllables

lackadaisical, unrecognizing, irrespective, unenergetic, unperceptive, uncomprehending, unreflective

6 Syllables

undeliberate, one-dimensional

7 Syllables

overventuresome