| nutty(weak, simple, silly, foolish, unreasonable) |
| thick(adjective, dull, simple, slow, silly) |
| unwise(adjective, weak, simple, silly, foolish) |
| weak-minded(adjective, ability, planned) |
| brain-dead(adjective, stupid) |
| daffy(adjective, weak, simple, slow, silly) |
| dim-witted(adjective, dull, simple, slow, foolish) |
| dizzy(adjective, simple, careless, foolish, stupid) |
| half-baked(adjective, dull, weak, simple, slow) |
| obtuse(adjective, dull, simple, slow, silly) |
| scatterbrained(adjective, simple, slow, stupid, boring) |
| thickheaded(adjective, simple, slow, stupid) |
| wacky(weak, simple, silly, foolish, unreasonable) |
| batty(impulsive, impractical, half-baked, doomed, unplanned) |
| blockheaded(adjective, simple, slow, foolish, stupid) |
| cockeyed(impractical, half-baked, doomed) |
| dimwitted(adjective, simple, silly, foolish, stupid) |
| dippy(weak, simple, silly, foolish, stupid) |
| dotty(adjective, weak, simple, silly, foolish) |
| featherbrained(adjective, simple, careless, foolish, stupid) |