| extemporary(adjective, free, casual, impulsive, spontaneous) |
| precipitate(noun, adjective, passionate, violent, thoughtless) |
| reflexive(adjective, impulsive, unwilling, obligatory, compulsory) |
| unguarded(adjective, thoughtless, impulse, unwary, nonpreparation) |
| unrehearsed(adjective, free, impulsive, spontaneous, unprepared) |
| ad-lib(adjective, spontaneous, unprepared, impromptu, unplanned) |
| candid |
| incidental(adjective, careless, chance, casual, random) |
| makeshift(adjective, free, informal, casual, snap) |
| thoughtless(adjective, careless, impetuous, inconsiderate, hasty) |
| uncontrived |
| unforeseen(adjective, chance, intention, unplanned, accidental) |
| coincidental |
| extemporized(adjective, spontaneous, unprepared, unplanned, unrehearsed) |
| headlong(noun, adjective, passionate, violent, thoughtless) |
| heedless(adjective, careless, thoughtless, inconsiderate) |
| hit-or-miss(adjective, careless, chance, casual, spontaneous) |
| hurried(adjective, impulsive, rash, unthinking) |
| ill-considered(adjective, impulsive) |
| indeliberate |