Synonyms|148Antonyms|11|Broader|0Narrower|0Related|67
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unstable(lively, impulsive, unpredictable, changeable, temperamental)
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unsteady(impulsive, unpredictable, explosive)
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unwary(thoughtless, impetuous)
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up
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up and down(expression, adjective, idiom)
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vaporous(impulsive, unpredictable, explosive)
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whimsical(impulsive, unpredictable, explosive)
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witty(lively, unpredictable, changeable)
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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>