| haphazard(adjective, organization, plan, insignificant, casual) |
| irregular(adjective, adverb, insignificant, chance, casual) |
| chance(noun, adjective, casual, planned, fickle) |
| casual(adjective, uncertainty, chance, irregular, erratic) |
| unplanned(adjective, insignificant, chance, casual, irregular) |
| aimless(adjective, uncertainty, insignificant, chance, casual) |
| erratic(adjective, careless, casual, irregular, frivolous) |
| sporadic(adjective, irregular, disturbed, broken, off) |
| fortuitous(adjective, chance, casual, erratic, frivolous) |
| arbitrary(adjective, careless, chance, casual, haphazard) |
| accidental(adjective, chance, casual, erratic, frivolous) |
| incidental(adjective, chance, casual, irregular, minor) |
| adventitious(adjective, chance, secondary, subsidiary, related) |
| occasional(adjective, chance, irregular, secondary, erratic) |
| purposeless(adjective, insignificant, chance, casual, useless) |
| indiscriminate(adjective, insignificant, chance, casual, irregular) |
| unsystematic(adjective, careless, casual, unreliable, extensive) |
| confused(adjective, adverb, extensive, chaotic, haphazard) |
| fitful(adjective, irregular, disturbed, unreliable, broken) |
| hit-or-miss(adjective, adverb, insignificant, chance, casual) |