| bemused(adjective, light, careless, silly, shaky) |
| changeful(adjective, careless, silly, impulsive, unsteady) |
| eccentric(caprice, imbecility folly) |
| fitful(adjective, uneven, unbalanced, unhinged, caprice) |
| flustered(adjective, careless, silly, impulsive, unsteady) |
| gaga(adjective, ability, informal, careless, silly) |
| gay(adjective, happy, silly, foolish, cheerful) |
| hare-brained(noun, inattention) |
| mercurial(adjective, unpredictable, unreliable, changeable, uneven) |
| queer(adjective, sick, well, unwell) |
| rash(adjective, careless, wild, foolish, stupid) |
| unsettled(adjective, silly, impulsive, unpredictable, uneven) |
| wanton(wild, reckless, rashness, debauched, caprice) |
| daft(adjective, stupid, crazy) |
| flippant(adjective, impulsive, unpredictable, playful, explosive) |
| freakish |
| frothy(adjective, ability, careless, inconstant, irresolution) |
| ill(sick, unwell) |
| impulsive(adjective, unpredictable, unreliable, changeable, erratic) |
| inconsistent(stupid, unpredictable, unreliable, changeable, absurd) |