536 entries under adjective topic. ×

4
eye-opening(amazing, astonishing, astounding, dumbfounding)
4
fly-by-night(capricious, irresolute)
4
impellent
4
impromptu(adverb, simple, natural, chance)
4
improvised(adverb, simple, natural, chance)
4
inconsistent(unstable, irregular, unsettled, unpredictable)
4
irregular(lively, active, unstable, chance)
4
out of the blue(expression, idiom, wonderful, abrupt)
4
random(chance, irregular, disturbed, broken)
4
scatterbrained
4
snap(noun, impulse, spontaneous, impromptu)
4
sporadic(capricious, motiveless)
4
temperamental(moving, cross, careless, lively)
4
touchy(nervous, unstable, restless, fiery)
4
unguarded(careless, bold, thoughtless, impulse)
4
unmindful(careless, bold, thoughtless, inappropriate)
4
unrehearsed(spontaneous, unplanned, unprompted, spur-of-the-moment)
4
unsteady(unstable, unsettled, unpredictable, unreliable)
4
urgent(extreme, quick, speedy, sudden)
3
brittle
11 years ago|18k views|share |citing 
APASmart Define. (2015). impulsive thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/impulsive/thesaurus/synonyms
ChicagoSmart Define. 2015. "impulsive thesaurus" https://smartdefine.org/impulsive/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, impulsive thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/impulsive/thesaurus/synonyms>.
MLASmart Define. "impulsive thesaurus" 3 August 2015. Web. 24 September 2026. <https://smartdefine.org/impulsive/thesaurus/synonyms>