| purposeless(adjective, chance, planned, haphazard, unplanned) |
| spontaneous(adjective, natural, chance, routine, impulsive) |
| uncalculated(adjective, chance, ignorant, hidden, unconscious) |
| undevised(adjective, planned, unplanned, accidental, inadvertent) |
| unexpected(adjective, chance, planned, unplanned, accidental) |
| unforeseen(adjective, chance, planned, intention, unplanned) |
| unmeant(adjective, planned, unknowing, unaware, unsuspecting) |
| aimless(adjective, chance, planned, unknowing, haphazard) |
| impulsive(adjective, simple, natural, chance, casual) |
| reflex(adjective, ignorant, hidden, unconscious, unaware) |
| blind(necessity, unwilling, obligatory, compulsory) |
| fluky(adjective, chance, haphazard, unplanned, accidental) |
| forced(unwilling, obligatory, compulsory) |
| ignorant(adjective, unknowing, inoffensive, unaware, harmless) |
| incidental(adjective, chance, haphazard, unplanned, accidental) |
| unstudied(adjective, simple, natural, casual, impulsive) |
| unwilling(obligatory, compulsory) |
| conditioned(adjective, unwilling, obligatory, compulsory) |
| contingent(chance, haphazard, unplanned, accidental, unintended) |
| mechanical(adjective, necessity) |