Synonyms and related words :
apish, artless, asinine, awkward, bad, batty, befooled, beguiled, besotted, brainless, buffoonish, bumbling, bungling, clumsy, cockeyed, crazy, credulous, daffy, daft, dazed, dizzy, doting, dumb, fatuitous, fatuous, flaky, fond, fool, foolheaded, foolish, fuddled, futile, gaga, gauche, goofy, graceless, gulled, half-assed, halting, ham-handed, headless, idiotic, ignorant, ill-adapted, ill-advised, ill-assorted, ill-chosen, ill-considered, ill-fitted, ill-judged, ill-matched, ill-sorted, ill-suited, ill-timed, imbecile, impolitic, improper, imprudent, inadept, inadmissible, inadvisable, inane, inapplicable, inapposite, inappropriate, inapt, inattentive, incapable, incapable of, incompetent, incongruous, indiscreet, ineffective, inefficient, inexpedient, inexpert, infatuated, infelicitous, inferior, injudicious, inopportune, insane, insensate, irrational, irrelevant, kooky, lackbrained, lean-minded, lean-witted, loony, lumbering, mad, mal a propos, maladjusted, maladroit, malapropos, maudlin, mediocre, mindless, misguided, misjoined, mismatched, mismated, misplaced, moronic, not bright, nutty, of little brain, out of character, out of joint, out of keeping, out of line, out of place, out of proportion, out of season, out of time, out of tune, pea-brained, pedestrian, pin-brained, poor, reasonless, sappy, screwy, senseless, sentimental, silly, skill-less, slackminded, slackwitted, stupid, thoughtless, unable, unable to, unadapted, unadvised, unapt, unbecoming, unbefitting, undeft, undesirable, undexterous, undextrous, undiplomatic, undue, unendowed, unfacile, unfit, unfitted, unfitting, unfortunate, ungainly, ungifted, unhandy, unhappy, unintellectual, unintelligent, unmeet, unproficient, unprofitable, unqualified, unreasoning, unseasonable, unseemly, unskilled, unskillful, unsuitable, unsuited, untalented, unthinking, untimely, unwise, unworkmanlike, wacky, wet, witless, wooden, wrong