| stupid(adjective, dull, simple, mind, slow) |
| dull(adjective, simple, ability, slow, stupid) |
| dim-witted(adjective, dull, simple, slow, stupid) |
| half-assed |
| thick(adjective, dull, slow, stupid) |
| dense(adjective, dull, slow, stupid, impassive) |
| obtuse(adjective, dull, slow, stupid, impassive) |
| moronic(adjective, dull, simple, mind, think) |
| dim |
| dumb(adjective, dull, slow, stupid, impassive) |
| dull-witted |
| feeble-minded(adjective, ability, offensive, stupid) |
| doltish(adjective, dull, slow, stupid, impassive) |
| simple(adjective, dull, ability, slow, stupid) |
| thickheaded(adjective, slow, stupid) |
| slow(adjective, dull, simple, ability, mind) |
| stolid(adjective, dull, slow, stupid, impassive) |
| unintelligent(adjective, mind, think, stupid) |
| weak-minded(adjective, ability, mind, offensive, think) |
| backward(adjective, ability) |