Synonyms|410Antonyms|71|Broader|1Narrower|7Related|371

63 entries under clandestine topic. ×

1
wildcat(secretly, slyly, underhandedly, surreptitiously)
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ambiguous(underground, undisclosed)
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arcane(underground, undisclosed)
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backdoor(underground, undisclosed)
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classified(adjective, secret, underground, undisclosed)
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discreet(underground, undisclosed)
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dissimulated(underground, undisclosed)
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enigmatical(underground, undisclosed)
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inside(underground, undisclosed)
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out-of-the-way(underground, undisclosed)
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restricted(adjective, secret, underground, undisclosed)
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retired(underground, undisclosed)
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slyly(secretly, underhandedly, surreptitiously)
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strange(underground, undisclosed)
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top-secret(secret, underground, undisclosed)
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top secret(expression, underground, undisclosed)
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unacknowledged(underground, undisclosed)
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under false pretense(expression, idiom, underground, undisclosed)
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underhandedly(secretly, slyly, surreptitiously)
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unenlightened(underground, undisclosed)
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APASmart Define. (2015). undercover thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/undercover/thesaurus/synonyms
ChicagoSmart Define. 2015. "undercover thesaurus" https://smartdefine.org/undercover/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, undercover thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/undercover/thesaurus/synonyms>.
MLASmart Define. "undercover thesaurus" 13 April 2015. Web. 28 September 2026. <https://smartdefine.org/undercover/thesaurus/synonyms>