| boneheaded(adjective, silly, impulsive, impractical, unintelligent) |
| crackpot(adjective, crazy, mad, odd, insane) |
| crass(adjective, coarse, insensitive) |
| demented |
| dense(adjective, dull, simple, slow, silly) |
| dim-witted(adjective, simple, slow, foolish, stupid) |
| dizzy |
| dotty(adjective, weak, simple, silly, foolish) |
| flighty(careless, stupid, unthinking, obtuse, unperceptive) |
| fool |
| ill-considered(adjective, weak, simple, careless, silly) |
| jerky(adjective, weak, simple, silly, foolish) |
| kooky(adjective, weak, simple, silly, foolish) |
| ludicrous(adjective, dull, weak, simple, silly) |
| rash(adjective, dull, careless, silly, foolish) |
| reasonless |
| reckless(adjective, crazy, mad, odd, insane) |
| ridiculous(adjective, weak, simple, silly, foolish) |
| thickheaded |
| undiscerning(adjective, careless, stupid, unthinking, obtuse) |