| antic |
| arbitrary(adjective, careless, casual) |
| casualty(noun, smash, crash, hazard, setback) |
| chancy(uncertain, unpredictable) |
| character |
| erratic(adjective, unusual, careless, strange, chance) |
| exotic(adjective, unusual, strange, new, unknown) |
| far-out(adjective, extraordinary, unusual, strange, exceptional) |
| fluky(uncertain, chance, unpredictable, liable, unplanned) |
| impromptu(adjective, chance, unqualified, abrupt, rapid) |
| inadvertent(adjective, unplanned, unintentional, accidental, unintended) |
| inconceivable(adjective, extraordinary, unusual, strange, exceptional) |
| irregular(adjective, extraordinary, unusual, careless, strange) |
| kooky(adjective, unusual, strange) |
| monstrous |
| mysterious(unusual, strange, wonder, peculiar) |
| nonstandard(irregular, uncharacteristic) |
| novel(adjective, unusual, strange, new, unknown) |
| occasional(adjective, chance, unplanned, unpremeditated) |
| out-of-the-way(new, odd, unknown, bizarre, untried) |