| kooky(adjective, silly, foolish, crazy) |
| touched(adjective, silly, foolish, crazy) |
| fruity(adjective, slang, informal, silly, foolish) |
| mental(adjective, simple, silly, foolish) |
| round the bend(expression, adjective, idiom, silly, foolish) |
| unhinged(adjective, silly, crazy, insane) |
| of unsound mind(expression, adjective, idiom, silly) |
| crazed(adjective, wild, silly, foolish, crazy) |
| dippy(adjective, slang, crazy) |
| potty(adjective, silly, foolish, insane) |
| maniacal(adjective, silly, crazy, insane) |
| out to lunch(expression, adjective, idiom, silly) |
| moonstruck(adjective, silly, foolish, insane) |
| eccentric(adjective, silly, foolish, crazy) |
| cockamamie(adjective, slang, crazy) |
| flaky(adjective, simple, silly, foolish, crazy) |
| foolish(adjective, simple, silly, crazy) |
| psycho(silly, foolish, crazy, insane) |
| screwball(adjective, silly, foolish, crazy) |
| silly(adjective, simple, foolish, crazy) |