| random(adjective, uncertainty, chance, irregular, erratic) |
| informal(adjective, calm, open, free, smooth) |
| easygoing(adjective, feature, state, calm, cool) |
| relaxed(adjective, feature, state, calm, clear) |
| nonchalant(adjective, feature, state, calm, cool) |
| chance(adjective, careless, irregular, extra, surprise) |
| unconcerned(adjective, feature, state, calm, cool) |
| insouciant(adjective, feature, state, calm, cool) |
| careless(adjective, feature, state, calm, cool) |
| free and easy(expression, adjective, idiom, feature, state) |
| accidental(adjective, careless, chance, extra, surprise) |
| haphazard(adjective, organization, plan, chance, erratic) |
| incidental(adjective, careless, chance, irregular, minor) |
| unplanned(adjective, free, simple, fake, natural) |
| easy(adjective, feature, state, calm, clear) |
| fortuitous(adjective, chance, surprise, erratic, frivolous) |
| irregular(adjective, careless, chance, variable, erratic) |
| occasional(adjective, chance, irregular, unreliable, uneven) |
| adventitious(adjective, chance, secondary, subsidiary, random) |
| offhand(adjective, calm, cool, free, simple) |