| unnoticed(adjective, ignored) |
| unplanned(noun, adjective, chance, casual, irregular) |
| careless(adjective, passionate, violent, foolish, casual) |
| casual(adjective, light, careless, small, insignificant) |
| devil-may-care(noun, adjective, passionate, violent, careless) |
| irresponsible(adjective, foolish, thoughtless, rash, impetuous) |
| precipitant(adjective, careful, rash) |
| promiscuous(adjective, chance, casual, irregular, odd) |
| random(adjective, careless, chance, casual, unreliable) |
| slapdash(adjective, careless, careful, chance, casual) |
| temerarious(adjective, foolish, careful, rash, irresponsible) |
| undiscriminating(adjective, extensive, chaotic, random, haphazard) |
| unheeded(adjective, abandoned, unseen, unkempt, deserted) |
| unmindful |
| unreasonable |
| unstudied |
| unthoughtful |
| unwise(adjective, foolish, thoughtless, rash, irresponsible) |
| adventurous(adjective, rash) |
| aimless(adjective, careless, casual, irregular, odd) |