Synonyms|148Antonyms|11|Broader|0Narrower|0Related|67
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imponderable(impulsive, unpredictable, explosive)
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imprudent(thoughtless, impetuous, unwary)
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inconsistent(adjective, impulsive, unpredictable, uneven, fickle)
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inconstant(lively, impulsive, unpredictable, changeable, temperamental)
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increase
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irresponsible(thoughtless, impetuous, unwary)
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light(impulsive, unpredictable, explosive)
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madcap(thoughtless, impetuous, unwary)
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momentary(impulsive, unpredictable, explosive)
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patchy(adjective, uneven)
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playful(impulsive, unpredictable, explosive)
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reckless(thoughtless, impetuous, unwary)
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short-lived(impulsive, unpredictable, explosive)
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spontaneous(thoughtless, impetuous, unwary)
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subtle(impulsive, unpredictable, explosive)
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temperamental(lively, impulsive, unpredictable, changeable, explosive)
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thoughtless(impetuous, unwary)
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transient(impulsive, unpredictable, explosive)
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transitory(impulsive, unpredictable, explosive)
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unsettled(impulsive, unpredictable, explosive)
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APASmart Define. (2015). up-and-down thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/up-and-down/thesaurus/synonyms
ChicagoSmart Define. 2015. "up-and-down thesaurus" https://smartdefine.org/up-and-down/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, up-and-down thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/up-and-down/thesaurus/synonyms>.
MLASmart Define. "up-and-down thesaurus" 13 April 2015. Web. 29 September 2026. <https://smartdefine.org/up-and-down/thesaurus/synonyms>