57 entries under fickle topic. ×

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falsehearted(untrustworthy, unprincipled, recreant, dirty-dealing)
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fly by night(expression, idiom, untrustworthy, unprincipled)
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foresworn(untrustworthy, unprincipled, dirty-dealing)
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inconstant(untrustworthy, unprincipled)
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lubricious(untrustworthy, unprincipled, dirty-dealing)
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lying(untrustworthy, unprincipled, dirty-dealing)
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mercentary(untrustworthy, unprincipled, dirty-dealing)
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moonlighting(untrustworthy, unprincipled, dirty-dealing)
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not true to(expression, idiom, untrustworthy, unprincipled)
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of bad faith(expression, idiom, untrustworthy, unprincipled)
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perfidious(untrustworthy, unprincipled, dirty-dealing)
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perjurious(untrustworthy, unprincipled, dirty-dealing)
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polygamous(untrustworthy, unprincipled)
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quicksilver(untrustworthy, unprincipled, dirty-dealing)
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snake in grass(expression, idiom, untrustworthy, unprincipled)
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stop-at-nothing(untrustworthy, unprincipled, dirty-dealing)
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stop at nothing(expression, idiom, untrustworthy, unprincipled)
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traitorous(untrustworthy, unprincipled, dirty-dealing)
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treacherous(adjective, dishonest, deceitful, untrustworthy)
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treasonable(untrustworthy, unprincipled, dirty-dealing)
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APASmart Define. (2015). under cover thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/under_cover/thesaurus/synonyms
ChicagoSmart Define. 2015. "under cover thesaurus" https://smartdefine.org/under_cover/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, under cover thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/under_cover/thesaurus/synonyms>.
MLASmart Define. "under cover thesaurus" 13 April 2015. Web. 27 September 2026. <https://smartdefine.org/under_cover/thesaurus/synonyms>