Synonyms|712Antonyms|71|Broader|16Narrower|13Related|229

57 entries under underground topic. ×

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restricted(secret, clandestine, undisclosed, confidential)
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reticent(obscure, unknown, clandestine, undisclosed)
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shrouded(obscure, unknown, clandestine, undisclosed)
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sneak(clandestine, undisclosed)
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strange(obscure, unknown, clandestine, undisclosed)
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sub-rosa(secret, clandestine, undisclosed, top-secret)
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top-secret(secret, clandestine, undisclosed)
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unacknowledged(clandestine, undisclosed)
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under-the-table(secret, clandestine, undisclosed, top-secret)
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under false pretense(expression, idiom, clandestine, undisclosed)
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unenlightened(obscure, unknown, clandestine, undisclosed)
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unintelligible(obscure, unknown, clandestine, undisclosed)
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unknown(obscure, clandestine, undisclosed, unrevealed)
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unpublished(obscure, unknown, clandestine, undisclosed)
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unrevealed(adjective, obscure, secret, unknown, clandestine)
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unseen(obscure, unknown, clandestine, undisclosed)
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veiled(obscure, unknown, clandestine, undisclosed)
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APASmart Define. (2015). closet thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/closet/thesaurus/synonyms
ChicagoSmart Define. 2015. "closet thesaurus" https://smartdefine.org/closet/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, closet thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/closet/thesaurus/synonyms>.
MLASmart Define. "closet thesaurus" 30 September 2015. Web. 27 September 2026. <https://smartdefine.org/closet/thesaurus/synonyms>