| crazy(adjective, insane, irrational, sane, distraught) |
| mad(adjective, lively, active, insane, unpredictable) |
| daft(adjective, insane, sane, distraught, batty) |
| dotty(adjective, insane, sane, distraught, batty) |
| loony(adjective, informal, insane, sane, distraught) |
| dizzy(adjective, upset, light, slang, ability) |
| batty(adjective, slang, insane, sane, distraught) |
| moonstruck(adjective, sane) |
| smitten |
| cuckoo(adjective, slang, insane, sane, distraught) |
| bonkers(adjective, informal, crazy, sane) |
| infatuated |
| nutty(adjective, keen, slang, warm, passionate) |
| cracked(adjective, informal, insane, sane, distraught) |
| demented(adjective, insane, sane, distraught, batty) |
| doddering |
| empty-headed(adjective, ability, careless, unstable, faint) |
| flighty(adjective, ability, careless, lively, active) |
| frivolous(adjective, ability, careless, unstable, unreliable) |
| insane(adjective, sane, distraught, batty, schizophrenic) |