Synonyms of lamebrained

1 Syllable

dull, rash

2 Syllables

silly, numbskull, foolish, fatuous, vacuous, witless, stupid, gorked, doltish, loony, flighty, inept, heedless, remiss, dumdum, mindless, reckless

3 Syllables

regardless, imprudent, bovine, neglectful, puerile, retardo, senseless, confused, inane, unheeding, unmindful, unthinking, retarded, obtuse, careless, negligent

4 Syllables

irrational, ill-advised, empty-headed, unreasoning, injudicious, inadvertent, undiscerning

5 Syllables

unreasonable, ill-considered, underachieving, irreflective, inattentive, unreflective, unbelievable

6 Syllables

incomprehensible