| bedlamite(noun, character, fanatic, cuckoo, dissentient) |
| cabbage |
| crank |
| dement(character, fanatic, loony, dissentient, neurotic) |
| deranged person(expression, character, fanatic, dissentient, misfit) |
| freak |
| fruitcake(character, fanatic, dissentient, neurotic, lamebrain) |
| head case(expression, neurotic, worrier, nutter, valetudinary) |
| inpatient |
| insane |
| looney(noun, character, dissentient, misfit) |
| mad |
| mental case(expression, character, dissentient, lamebrain, schizoid) |
| mental defective(expression, neurotic, lamebrain, schizoid, dingbat) |
| newfangled contraption(expression, character, fanatic, dissentient, misfit) |
| non compos(expression, neurotic, worrier, nutter, valetudinary) |
| nut case(expression, character, crazy, fanatic, loony) |
| raver(character, loony, dissentient, misfit, lamebrain) |
| raving lunatic(expression, neurotic, worrier, nutter, valetudinary) |
| schizophrenic(noun, worrier, nutter, valetudinary, nutcase) |