| dippy(adjective, weak, simple, knowledge, slang) |
| doltish(adjective, dull, weak, simple, slow) |
| dotty(adjective, weak, simple, silly, foolish) |
| thoughtless(adjective, silly, foolish, stupid, senseless) |
| dopey(adjective, dull, simple, knowledge, slang) |
| half-baked(adjective, dull, weak, simple, slow) |
| wacky(adjective, weak, simple, knowledge, slang) |
| dense(adjective, dull, simple, slow, silly) |
| feebleminded(adjective, weak, simple, silly, foolish) |
| simple-minded(adjective, dull, simple, slow, silly) |
| goofy(adjective, foolish, impractical, half-baked, doomed) |
| obtuse(adjective, dull, simple, slow, silly) |
| boneheaded(adjective, slow, silly, stupid, impulsive) |
| screwy |
| unreasonable(adjective, weak, simple, silly, foolish) |
| unthinking(adjective, dull, simple, slow, silly) |
| addle-pated |
| batty(adjective, silly, foolish, stupid, crazy) |
| daffy(adjective, weak, simple, slow, silly) |
| empty-headed(adjective, silly, foolish, stupid) |