| unconscious(adjective, simple, natural, casual, impulsive) |
| ad hoc(expression, adjective, idiom, free, unplanned) |
| ad libitum(expression, adjective, idiom, adverb, informal) |
| extemporaneously(adverb, impulse, offhand, spontaneously, improv) |
| extemporization(noun, planned, prepared, improvised, improvisation) |
| haphazard(adjective, unprepared, accidental, unintended) |
| hasty(adjective, impulsive) |
| improvisation(noun, planned, impulse, prepared, improvised) |
| offhanded |
| candid |
| extemporized(adjective, adverb, informal, unprepared, unplanned) |
| improv(adjective, adverb, free, offhand, unprepared) |
| improvise(verb, adjective, informal, unplanned, extemporize) |
| impulsive(adjective, adverb, simple, natural, chance) |
| abrupt(adjective, impulsive) |
| automatic(adjective, free, simple, fake, natural) |
| informal(adjective, free, casual, impulsive, spontaneous) |
| involuntary(adjective, simple, natural, casual, impulsive) |
| reflex |
| snap(adjective, free, casual, impulsive, prepared) |