| injudicious(adjective, feature, speech, conduct, dullness) |
| empty-headed(adjective, mind, behavior, idiotism, characteristic) |
| unthinking(adjective, mind, foolishness, behavior, disability) |
| simpleminded(adjective, mind, behavior, idiotism, characteristic) |
| inane(adjective, characteristic, stupid, stupidity, foolishness) |
| stolid(adjective, characteristic, stupid, apathetic, stupidity) |
| slow-witted(adjective, mind, behavior, idiotism, characteristic) |
| dopy(adjective, mind, behavior, foolishness, disability) |
| heedless(adjective, feature, speech, conduct, dullness) |
| imbecilic(adjective, mind, behavior, idiotism, characteristic) |
| moronic(adjective, mind, behavior, idiotism, characteristic) |
| normal(adjective, characteristic, dull, stupid, stupidity) |
| out to lunch(slang, expression, characteristic, stupidity, foolishness) |
| rash(adjective, feature, speech, conduct, dullness) |
| reckless(adjective, characteristic, stupidity, foolishness) |
| shortsighted(adjective, feature, speech, conduct, dullness) |
| thickheaded(adjective, mind, behavior, foolishness, disability) |
| unaware(adjective, characteristic, dull, stupid, stupidity) |
| dorky(adjective, mind, behavior, idiotism, slang) |
| gormless(adjective, mind, behavior, idiotism, british) |