76 entries under expression topic. ×

1
without restraint(adverb, extemporaneous)
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gone off deep end(adjective, idiom, thoughtless, impetuous)
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in a huff(idiom, melancholy, miserable, unstable)
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according to pleasure(idiom, adverb, extemporaneous)
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ad hoc(spontaneous, unprepared, unplanned)
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anterior to reason(idiom, reasoning)
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as one thinks best(idiom, adverb, extemporaneous)
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as one wishes(idiom, adverb, extemporaneous)
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at will(adverb, extemporaneous)
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by chance(chance, unplanned, unpremeditated)
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driving force
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easily provoked(volatile, impetuous)
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easily upset(volatile, fiery, temperamental)
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falling apart(adjective, moving, touching, exciting)
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free and easy(idiom, rashness)
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going off deep end(idiom, rash, unthinking)
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hanging by a thread(idiom, changeable, erratic, random)
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honest and straightforward
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in a hurry(adjective, idiom, raring)
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in batches
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APASmart Define. (2015). impulsive thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/impulsive/thesaurus/synonyms
ChicagoSmart Define. 2015. "impulsive thesaurus" https://smartdefine.org/impulsive/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, impulsive thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/impulsive/thesaurus/synonyms>.
MLASmart Define. "impulsive thesaurus" 3 August 2015. Web. 22 September 2026. <https://smartdefine.org/impulsive/thesaurus/synonyms>