| unpredicted(extraordinary, wonderful, shocking, astonishing, astounding) |
| abrupt |
| arbitrary(changeable, erratic, random) |
| capricious(uncertain, unpredictable, changeable, fickle, erratic) |
| chancy(uncertain, unpredictable, changeable, erratic, random) |
| changeable(uncertain, unpredictable, erratic, random, unexpected) |
| dicey(changeable, erratic, random) |
| doubtful(changeable, erratic, random) |
| erratic(changeable, random) |
| extraordinary(wonderful, shocking, astonishing, astounding) |
| fickle(changeable, erratic, random) |
| fluctuating(changeable, fickle, erratic, random) |
| fluky(uncertain, unpredictable, changeable, fickle, erratic) |
| hanging by a thread(expression, idiom, changeable, fickle, erratic) |
| iffy(changeable, erratic, random) |
| incalculable(uncertain, unpredictable, changeable, erratic, random) |
| inconstant(changeable, erratic, random) |
| irregular(changeable, erratic, random) |
| pop-up |
| random(uncertain, unpredictable, changeable, fickle, erratic) |