| raving |
| batty(adjective, slang, sane) |
| crank(noun, crazy, mad, radical, lunatic) |
| daffy(adjective, informal, sane) |
| demoniac(noun, mad, lamebrain, schizophrenic, madman) |
| amok |
| bananas(adjective, slang, crazy, mad, insane) |
| berserk |
| bonkers(adjective, informal, sane) |
| brainsick(adjective, wrong, crazy, sick, insane) |
| buff(noun, concern, informal, nut, fan) |
| bug(noun, concern, nut, radical, fan) |
| cracked(adjective, informal, sane) |
| crazy person(noun, expression, idiom, person) |
| devotee(noun, concern, nut, radical, fan) |
| disordered(adjective, hot, crazy, insane, irrational) |
| distraught(adjective, wrong, crazy, sick, irrational) |
| dotty(adjective, crazy, sick, insane, irrational) |
| energumen |
| flake(noun, person, crazy, mad, lunatic) |