| offhand(noun, adjective, free, prepared, spontaneous) |
| spontaneous(noun, adjective, free, fake, informal) |
| extemporaneous(noun, adjective, impulsive, prepared, spontaneous) |
| unpremeditated(noun, adjective, free, impulsive, spontaneous) |
| impromptu(adjective, adverb, free, prepared, spontaneous) |
| unplanned(noun, adjective, free, impulsive, spontaneous) |
| extempore(adjective, free, prepared, spontaneous, impromptu) |
| unprepared(adjective, free, spontaneous, impromptu, unrehearsed) |
| unstudied(adjective, free, spontaneous, impromptu, unrehearsed) |
| extemporary(adjective, free, casual, impulsive, prepared) |
| impetuous(noun, adjective, quick, impulsive, thinking) |
| impulsive(noun, adjective, violent, natural, fierce) |
| snap(noun, adjective, free, fake, informal) |
| unrehearsed(adjective, free, prepared, spontaneous, unprepared) |
| ad-lib(adjective, prepared, spontaneous, unprepared, impromptu) |
| off-the-cuff(adjective, informal, impulsive, prepared, spontaneous) |
| off the cuff(expression, adjective, free, impromptu, unrehearsed) |
| automatic(adjective, free, informal, casual, impulsive) |
| casual(adjective, free, informal, impulsive, unprepared) |
| immediate(noun, adjective, free, informal, casual) |