Synonyms|558Antonyms|116|Broader|11Narrower|9Related|411

40 entries under undisclosed topic. ×

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dissembled(secret, clandestine)
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dissimulated
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enigmatical(obscure, unknown, clandestine, unrevealed)
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incognito(secret, hidden, spy, clandestine)
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out-of-the-way(obscure, unknown, clandestine, unrevealed)
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restricted
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reticent(obscure, unknown, clandestine, unrevealed)
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retired(obscure, unknown, clandestine, unrevealed)
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secretive(adjective, clandestine, subversive, dissident)
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sneak
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strange(obscure, unknown, clandestine, unrevealed)
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sub-rosa(secret, hidden, spy, clandestine)
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top-secret
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top secret(expression, clandestine)
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unacknowledged
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under false pretense(expression, idiom, clandestine)
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unenlightened(obscure, unknown, clandestine, unrevealed)
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unfrequented(obscure, unknown, clandestine, unrevealed)
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unintelligible(obscure, unknown, clandestine, unrevealed)
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unpublished(obscure, unknown, clandestine, unrevealed)
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APASmart Define. (2015). underground thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/underground/thesaurus/synonyms
ChicagoSmart Define. 2015. "underground thesaurus" https://smartdefine.org/underground/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, underground thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/underground/thesaurus/synonyms>.
MLASmart Define. "underground thesaurus" 3 November 2015. Web. 26 September 2026. <https://smartdefine.org/underground/thesaurus/synonyms>