| half-baked(adjective, dull, weak, simple, slow) |
| risible |
| slow-witted(adjective, dull, slow, stupid) |
| wacky(adjective, weak, simple, knowledge, slang) |
| dense(adjective, dull, simple, slow, silly) |
| goofy(adjective, foolish, impractical, half-baked, doomed) |
| halfwitted |
| obtuse(adjective, dull, simple, slow, silly) |
| simple-minded(adjective, simple, slow, silly, foolish) |
| batty(adjective, slow, silly, foolish, stupid) |
| boneheaded(adjective, impulsive, impractical, half-baked, doomed) |
| childish |
| empty-headed(adjective, silly, foolish, stupid) |
| feebleminded(adjective, weak, simple, silly, foolish) |
| half-witted(adjective, dull, weak, simple, silly) |
| hare-brained |
| ignorant(adjective, dull, simple, slow, foolish) |
| illogical(adjective, silly, stupid, insignificant, unreasonable) |
| jerky(adjective, weak, simple, knowledge, slang) |
| nuts |