| ridiculous(adjective, weak, simple, mind, think) |
| nutty(adjective, weak, simple, silly, foolish) |
| preposterous(adjective, weak, simple, knowledge, ability) |
| thick(adjective, dull, simple, slow, silly) |
| unintelligent(adjective, dull, weak, simple, mind) |
| daft(adjective, weak, simple, slow, silly) |
| feeble-minded(adjective, dull, simple, slow, foolish) |
| slow-witted(adjective, dull, simple, mind, think) |
| witless(adjective, dull, weak, simple, slow) |
| insane(adjective, weak, simple, knowledge, ability) |
| loony(adjective, weak, simple, knowledge, ability) |
| simple(adjective, dull, weak, slow, silly) |
| slow(adjective, dull, simple, mind, think) |
| backward(adjective, dull, simple, slow, silly) |
| cretinous(adjective, foolish, innocent, unfamiliar, unconscious) |
| half-witted(adjective, dull, weak, simple, slow) |
| irrational(adjective, weak, simple, silly, foolish) |
| laughable(adjective, dull, unintelligent, witless) |
| retarded(adjective, foolish, impulsive, impractical, half-baked) |
| weak-minded(adjective, mind, think, foolish) |