| delirious(adjective, crazy, mad, odd, insane) |
| distraught(adjective, wrong, foolish, stupid, crazy) |
| freak(noun, person, crazy, nut, fanatic) |
| kookie |
| looney(noun, adjective) |
| moonstruck(adjective, silly, foolish, stupid, insane) |
| not all there(noun, adjective, idiom, slang, sick) |
| nutcase(noun, slang, sick, mad person) |
| of unsound mind(expression, adjective, idiom, foolish, stupid) |
| out to lunch(expression, adjective, idiom, silly, foolish) |
| psychopath(noun, person, madness, insanity, psycho) |
| ridiculous(adjective, light, weak, simple, wrong) |
| around the bend(expression, adjective, idiom, wrong, confused) |
| berserk(adjective, silly, foolish, crazy, unwise) |
| bughouse |
| crank(noun, informal, crazy, wise) |
| dizzy(adjective, light, pleasant, happy, silly) |
| dopey(adjective, knowledge, slang, ability, foolish) |
| flaky(adjective, light, silly, stupid, crazy) |
| fool |