| unpredictable(adjective, uncertainty, doubtful, vague, hesitant) |
| capricious(adjective, unpredictable, changeable, erratic, random) |
| chance(adjective, unpredictable, changeable, erratic, random) |
| uncertain(adjective, doubtful, vague, unpredictable, changeable) |
| random(adjective, unpredictable, changeable, erratic, unexpected) |
| unexpected(adjective, unpredictable) |
| chancy(adjective, doubtful, vague, unpredictable, changeable) |
| changeable(adjective, doubtful, vague, hesitant, unpredictable) |
| dicey(changeable, intention, erratic, random) |
| risky(adjective, doubtful, vague, unsure, intention) |
| unforeseen(adjective, secret, liable, dependent, depending) |
| aleatory |
| casual |
| unsure(adjective, doubtful, vague) |
| accidental |
| contingent(adjective, possible, conditional) |
| fluky(adjective, unpredictable, changeable, erratic, random) |
| fortuitous |
| incalculable(adjective, doubtful, vague, hesitant, unpredictable) |
| indeterminate(adjective, doubtful, vague, hesitant, changeable) |