| demented(noun, adjective, simple, silly, foolish) |
| demoniac |
| deranged(noun, adjective, simple, silly, foolish) |
| deranged person(noun, expression, character, fanatic, dissentient) |
| disordered |
| eccentric(noun, adjective, character, keen, warm) |
| erotomaniac(noun, person, madness, insanity, psycho) |
| flake |
| foolish(adjective, simple, silly, crazy, mad) |
| fou |
| fruitcake(noun, character, nut, fanatic, loony) |
| harebrain(noun, crazy, nut, fanatic, loony) |
| insane man(noun, expression, character, dissentient, misfit) |
| kooky(adjective, keen, warm, silly, foolish) |
| loco |
| looney(noun, character, dissentient, misfit) |
| mad(adjective, simple, silly, foolish, crazy) |
| mad person(noun, expression, idiom, person) |
| madwoman(noun, character, fanatic, cuckoo, dissentient) |
| mental case(noun, expression, character, patient, lunatic) |