Synonyms|101Antonyms|1|Broader|0Narrower|0Related|10

70 entries under clandestine topic. ×

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out-of-the-way(underground, undisclosed)
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private(secret, underground, undisclosed)
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recondite(underground, undisclosed)
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reticent(underground, undisclosed)
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retired(underground, undisclosed)
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secluded(underground, undisclosed)
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secretive(underground, undisclosed)
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shrouded(underground, undisclosed)
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sly(underground, undisclosed)
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sneak(underground, undisclosed)
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sneaky(underground, undisclosed)
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stealthy(underground, undisclosed)
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strange(underground, undisclosed)
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sub-rosa(secret, underground, undisclosed)
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surreptitious(secret, underground, undisclosed)
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top secret(expression, secret, underground, undisclosed)
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unacknowledged(underground, undisclosed)
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under-the-table(secret, underground, undisclosed)
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under false pretense(expression, idiom, underground, undisclosed)
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undercover(secret, underground, undisclosed)
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APASmart Define. (2015). top-secret thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/top-secret/thesaurus/synonyms
ChicagoSmart Define. 2015. "top-secret thesaurus" https://smartdefine.org/top-secret/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2015, top-secret thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/top-secret/thesaurus/synonyms>.
MLASmart Define. "top-secret thesaurus" 14 April 2015. Web. 30 September 2026. <https://smartdefine.org/top-secret/thesaurus/synonyms>