100 entries under fickle topic. ×

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mercentary
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not true(expression, adjective, wrong, false, unpredictable)
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not trustworthy(expression, adjective, unpredictable, variable)
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on the QT(expression, idiom, unprincipled)
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on the quiet(expression, idiom, unprincipled)
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perjurious
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polygamous
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pretended(adjective, unpredictable, variable, undependable)
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pseudo(adjective, unpredictable, variable, undependable)
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quicksilver
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snake in grass(expression, idiom, unprincipled)
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stop-at-nothing
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stop at nothing(expression, idiom, unprincipled)
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sub-rosa
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unconverted(adjective, false, dishonest, dubious)
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unconvincing(adjective, unpredictable, variable, undependable)
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under cover(expression, unprincipled)
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undutiful
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yo-yo
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yoyo
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APASmart Define. (2016). untrustworthy thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/untrustworthy/thesaurus/synonyms
ChicagoSmart Define. 2016. "untrustworthy thesaurus" https://smartdefine.org/untrustworthy/thesaurus/synonyms (accessed October 1, 2026).
HarvardSmart Define 2016, untrustworthy thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/untrustworthy/thesaurus/synonyms>.
MLASmart Define. "untrustworthy thesaurus" 14 March 2016. Web. 1 October 2026. <https://smartdefine.org/untrustworthy/thesaurus/synonyms>