| fluctuant(irregular, unpredictable, unreliable) |
| gaga(careless, unstable, unreasonable, unpredictable, changeable) |
| harebrained |
| helter-skelter(careless, unstable, unreasonable, unpredictable, changeable) |
| humorsome(careless, unstable, unreasonable, unpredictable, changeable) |
| idiosyncratic(irregular, unpredictable, unreliable) |
| impulsive(adjective, careless, unstable, unreasonable, unpredictable) |
| inconsistent(adjective, irregular, unpredictable, unreliable) |
| inconstant(adjective, careless, unstable, unreasonable, irregular) |
| irregular(adjective, unpredictable, unreliable) |
| lubricious(careless, unstable, unreasonable, unpredictable, changeable) |
| meandering(irregular, unpredictable, unreliable, wandering, roving) |
| mercurial(careless, unstable, unreasonable, irregular, unreliable) |
| mutable(careless, unstable, unreasonable, unpredictable, changeable) |
| nomadic(irregular, unpredictable, unreliable, wandering, roving) |
| odd(careless, unstable, unreasonable, unpredictable, changeable) |
| oddball(irregular, unpredictable, unreliable) |
| peculiar(irregular, unpredictable, unreliable) |
| petulant |
| picky(careless, unstable, unreasonable, unpredictable, changeable) |