| childlike(simple, easy, innocent, real, genuine) |
| conditioned(adjective, unwilling, obligatory, compulsory) |
| excitable(adjective, upset, moving, intense, violent) |
| eye-opening(adjective, amazing, astonishing, astounding, dumbfounding) |
| fly-by-night(adjective, capricious, irresolute) |
| impellent(adjective, impulse) |
| impromptu(adjective, adverb, simple, natural, chance) |
| improvised(adjective, adverb, simple, natural, chance) |
| inconsistent(adjective, unstable, irregular, unsettled, unpredictable) |
| irregular(adjective, lively, active, unstable, chance) |
| out of the blue(expression, adjective, idiom, wonderful, abrupt) |
| random(adjective, chance, irregular, disturbed, broken) |
| scatterbrained(adjective, capricious) |
| snap(noun, adjective, impulse, spontaneous, impromptu) |
| sporadic(adjective, capricious, motiveless) |
| temperamental(adjective, moving, cross, careless, lively) |
| touchy(adjective, nervous, unstable, restless, fiery) |
| unguarded(adjective, careless, bold, thoughtless, impulse) |
| unmindful(adjective, careless, bold, thoughtless, inappropriate) |
| unrehearsed(adjective, spontaneous, unplanned, unprompted, spur-of-the-moment) |