| maniac(noun, person, crazy, mad, pervert) |
| psycho(noun, person, mad, madness, insanity) |
| psychotic(noun, person, mad, madness, insanity) |
| lunatic(noun, person, mad, nut, fanatic) |
| madman(noun, person, madness, insanity, lunatic) |
| insane |
| kook(noun, person, mad, nut, fanatic) |
| crackpot(noun, person, crazy, mad, nut) |
| sociopath(noun, person, criminal, patient, prone) |
| loony(noun, person, madness, insanity, psycho) |
| crazy(noun, person, madness, insanity, lunatic) |
| neurotic(noun, mad, lunatic, schizophrenic, maniac) |
| nut(noun, crazy, mad, patient, cuckoo) |
| nutcase(noun, person, nut, fanatic, patient) |
| bedlamite(noun, person, madness, insanity, psycho) |
| nutter |
| mental case(noun, expression, idiom, person, patient) |
| antisocial personality(noun, person, prone) |
| fiend(noun, person, madness, insanity, lunatic) |
| freak(noun, person, madness, insanity, psycho) |