214 entries under unpredictable topic. ×

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airy(impulsive, volatile, explosive)
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anomalous(irregular, unreliable)
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bizarre(careless, stupid, irregular, unreliable)
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brilliant(lively, changeable)
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bum(loose, unreliable, variable, irresponsible)
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cussed(unreliable, fickle, erratic)
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deceitful(adjective, false, dishonest, dubious)
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deceptive(adjective, fickle, variable, undependable)
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delusive(adjective, fickle, variable, undependable)
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devious(irregular, unreliable)
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directionless(irregular, unreliable)
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easily upset(expression, unreliable, fickle, erratic)
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elusive(impulsive, explosive)
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expansive(lively, impulsive, changeable, temperamental)
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fake(adjective, fickle, variable, undependable)
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fallible(adjective, fickle, variable, undependable)
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fast-talking(lively, changeable)
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flip(lively, changeable)
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flippant(impulsive, explosive)
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froward(unreliable, fickle, erratic, capricious)
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APASmart Define. (2016). unstable thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/unstable/thesaurus/synonyms
ChicagoSmart Define. 2016. "unstable thesaurus" https://smartdefine.org/unstable/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, unstable thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/unstable/thesaurus/synonyms>.
MLASmart Define. "unstable thesaurus" 26 February 2016. Web. 26 September 2026. <https://smartdefine.org/unstable/thesaurus/synonyms>