34 entries under improbability topic. ×

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poor lookout(expression, doubtfulness)
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poor prognosis(expression, doubtfulness)
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questionability(noun, doubtfulness, unlikelihood)
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remote possibility(expression, doubtfulness)
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sleeper
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slim chance(expression, doubtfulness, unlikelihood)
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stalking horse(expression, doubtfulness)
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underdog
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unexpected winner(expression, doubtfulness)
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unknown
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unknown quantity(expression, doubtfulness)
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unlikely winner(expression, doubtfulness)
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unreasonableness(noun, unlikelihood)
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upsetter
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APASmart Define. (2015). implausibility thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/implausibility/thesaurus/synonyms
ChicagoSmart Define. 2015. "implausibility thesaurus" https://smartdefine.org/implausibility/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, implausibility thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/implausibility/thesaurus/synonyms>.
MLASmart Define. "implausibility thesaurus" 10 April 2015. Web. 20 September 2026. <https://smartdefine.org/implausibility/thesaurus/synonyms>