| nut(noun, slang, informal, sick) |
| crackpot(noun, fool, crazy, wise) |
| lunatic(noun, person, wise, crackpot) |
| cuckoo(noun, slang, sick, wise) |
| kook(noun, slang, sick, wise) |
| maniac(noun, person, crazy, patient) |
| psycho(noun, slang, sick, patient) |
| flake(noun, slang, sick, fanatic) |
| crank(noun, informal, wise, schizophrenic) |
| lamebrain(noun, simple, fool, silly) |
| demoniac(noun, schizophrenic, maniac) |
| fruitcake(noun, nut, fanatic, lunatic) |
| psychopath(noun, crazy, patient, cuckoo) |
| psychotic(noun, patient, cuckoo, lunatic) |
| neurotic(noun, schizophrenic, maniac) |
| scatterbrain(noun, schizophrenic, maniac) |
| schizophrenic(noun, patient, lunatic, maniac) |
| sociopathic(noun, schizophrenic, maniac) |