50 entries under idiom topic. ×

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indication of locality(expression, warning)
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not expressed
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off the record
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rear guard(expression, warning)
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signal post(expression, warning)
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to the bottom(expression, sub-rosa, groundward)
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under another name
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under false pretense(expression, clandestine, underground, undisclosed)
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watch and ward(expression, warning)
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wrapt in clouds(expression, concealment)
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APASmart Define. (2015). undercover thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/undercover/thesaurus/synonyms
ChicagoSmart Define. 2015. "undercover thesaurus" https://smartdefine.org/undercover/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, undercover thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/undercover/thesaurus/synonyms>.
MLASmart Define. "undercover thesaurus" 13 April 2015. Web. 27 September 2026. <https://smartdefine.org/undercover/thesaurus/synonyms>