| simple-minded(adjective, dull, simple, ability, slow) |
| witless(adjective, dull, weak, simple, slow) |
| asinine(adjective, weak, simple, silly, foolish) |
| brain-dead(adjective, stupid) |
| imbecile(adjective, dull, simple, slow, silly) |
| retarded(adjective, ability, offensive) |
| absurd(adjective, weak, simple, silly, foolish) |
| feeble-minded(adjective, ability, offensive, stupid) |
| half-baked(dull, weak, simple, silly, foolish) |
| imbecilic(adjective, dull, weak, simple, silly) |
| loony(adjective, weak, simple, silly, foolish) |
| nonsensical(adjective, dull, weak, simple, silly) |
| silly(adjective, dull, weak, simple, foolish) |
| simpleminded(dull, simple, silly, foolish, stupid) |
| slow-witted(adjective, ability, offensive) |
| soft(adjective, ability, informal, offensive, silly) |
| unintelligent(adjective, dull, weak, simple, slow) |
| weak-minded(adjective, ability, offensive) |
| beaglebrained(adjective, stupid) |
| blithering(adjective, foolish) |