| nut(noun, slang, sick, fanatic, patient) |
| screwball(noun, slang, sick, fanatic, loony) |
| crackpot(noun, character, nut, fanatic, freak) |
| psycho(noun, slang, sick, nut, fanatic) |
| nutter(noun, slang, sick, mad person) |
| crank |
| eccentric(noun, character, freak, dissentient, misfit) |
| geek(noun, freak, oddball) |
| kook(noun, slang, sick, mad person) |
| loony(noun, slang, sick, mad person) |
| fruitcake(noun, character, freak, loony, oddball) |
| lunatic |
| madman(noun, character, lunatic, loony, dissentient) |
| Nut |
| loon(noun, slang, sick, nut, fanatic) |
| flake(noun, slang, sick, fanatic, loony) |
| oddball(noun, character, freak, patient, cuckoo) |
| psychopath(noun, person, nut, fanatic, patient) |
| wacko(noun, character, dissentient, misfit, lamebrain) |
| weirdo(noun, character, freak, dissentient, misfit) |