Synonyms|270Antonyms|4|Broader|0Narrower|0Related|30

68 entries under clandestine topic. ×

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on the QT(expression, idiom, obscure, unknown)
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recondite(obscure, unknown, underground, undisclosed)
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restricted(underground, undisclosed)
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secretive(underground, undisclosed)
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shrouded(obscure, unknown, 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(obscure, deep, unknown, underground)
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sub-rosa(underground, undisclosed)
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surreptitious(underground, undisclosed)
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top-secret(underground, undisclosed)
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top secret(expression, underground, undisclosed)
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unacknowledged(underground, undisclosed)
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under-the-table(underground, undisclosed)
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under false pretense(expression, idiom, underground, undisclosed)
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under wraps(expression, underground, undisclosed)
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undercover(underground, undisclosed)
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underground(obscure, unknown, undisclosed, unrevealed)
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APASmart Define. (2015). unfrequented thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/unfrequented/thesaurus/synonyms
ChicagoSmart Define. 2015. "unfrequented thesaurus" https://smartdefine.org/unfrequented/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, unfrequented thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/unfrequented/thesaurus/synonyms>.
MLASmart Define. "unfrequented thesaurus" 14 April 2015. Web. 28 September 2026. <https://smartdefine.org/unfrequented/thesaurus/synonyms>