| accidental(adjective, chance, ignorant, hidden, unconscious) |
| unpremeditated(adjective, ignorant, hidden, unconscious, unaware) |
| casual(adjective, chance, unintentional, accidental, unintended) |
| inadvertent(adjective, ignorant, hidden, unconscious, unaware) |
| unconscious(adjective, ignorant, hidden, unaware, oblivious) |
| unintended(adjective, ignorant, hidden, unconscious, oblivious) |
| unintentional(adjective, chance, ignorant, hidden, unconscious) |
| involuntary(adjective, ignorant, hidden, unconscious, unaware) |
| random(adjective, unintentional, unintended) |
| automatic(adjective, unwilling, obligatory, compulsory) |
| chance(adjective, unintentional, accidental, unintended) |
| spontaneous(adjective, chance, unwilling, obligatory, accidental) |
| unwitting(adjective, ignorant, hidden, unconscious, oblivious) |
| candid |
| fortuitous(adjective, chance, unintentional, accidental, unintended) |
| undesigned |
| unforeseen(adjective, secret, unexpected, surprising, unanticipated) |
| unplanned(adjective, chance, unintentional, accidental, unintended) |
| unstudied |
| adventitious(adjective, unintentional, unintended) |