| careless(adjective, foolish, stupid, unstable, unreasonable) |
| crazy(adjective, beat, simple, careless, wild) |
| flitting(adjective, capricious, motiveless) |
| frothy(adjective, slight, ability, careless, crazy) |
| hare-brained |
| head-in-the-clouds |
| irrational(adjective, simple, careless, foolish, stupid) |
| lightheaded(adjective, excited, unreliable, changeable, fickle) |
| mad(adjective, lively, foolish, active, crazy) |
| nutty(crazy, cuckoo, queer) |
| odd(careless, unstable, unreasonable, unpredictable, changeable) |
| shifting(adjective, unstable, unsettled, changeable, variable) |
| superficial(adjective, slight, silly, foolish, pleasing) |
| touched(crazy, cuckoo, queer) |
| unbalanced(adjective, fickle, irresponsible) |
| versatile(adjective, unstable, unsettled, changeable, variable) |
| witless(careless, stupid, unthinking, obtuse, unperceptive) |
| adrift(adjective, motiveless) |
| agitated(unstable, unsettled, variable, insanity) |
| arbitrary(adjective, careless, unstable, unreasonable, changeable) |