| involuntary(adjective, simple, natural, casual, impulsive) |
| irresistible(adjective, simple, natural, casual, impulsive) |
| jamming(adjective, spontaneous, unprepared, impromptu, unrehearsed) |
| jury-rigged |
| laid back(expression, adjective, simple, relaxed, straightforward) |
| loose(adjective, simple, easy, plain, modest) |
| made-up(adjective, informal, impulsive, impromptu, extemporaneous) |
| mixed(adjective, simple, plain, relaxed, straightforward) |
| motley(adjective, simple, plain, relaxed, straightforward) |
| natural(adjective, simple, straightforward, casual, impulsive) |
| off top of head(expression, adjective, idiom, simple, natural) |
| on-the-spot(adjective, spontaneous, unprepared, impromptu, unrehearsed) |
| on impulse(expression, adjective, spontaneous, unprepared, impromptu) |
| open(adjective, simple, plain, relaxed, straightforward) |
| ordinary(adjective, simple, plain, relaxed, straightforward) |
| random(chance, unplanned, unpremeditated) |
| simple(adjective, natural, straightforward, casual, impulsive) |
| sporty(adjective, simple, plain, relaxed, straightforward) |
| stopgap |
| straightforward(adjective, simple, easy, plain, relaxed) |