Synonyms of undiscerning

1 Syllable
lost, rapt, blind
2 Syllables
vague, dreamy, absent, bored, distraught, thoughtless, musing, heedless, remiss, blindest, purblind, unseeing, listless, off-guard, distrait
3 Syllables
distracted, amnesic, diverted, regardless, unsighted, removed, oblivious, neglectful, faraway, unheeding, unmindful, unthinking, unconscious, typhlotic, careless, unwatchful, visionless, preoccupied
4 Syllables
lamebrained, uncritical, indifferent, apathetic, inadvertent, absentminded, unnoticing, amaurotic, inobservant, unobserving, unperceiving, unobservant, scatterbrained
5 Syllables
unperceptive, unrecognizing, uncomprehending, inattentive, unreflective