Synonyms|450Antonyms|97|Broader|7Narrower|0Related|60

64 entries under underground topic. ×

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camouflaged(obscure, unknown, clandestine, undisclosed)
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cloak-and-dagger(obscure, unknown, clandestine, undisclosed)
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closet(obscure, intimate, private, unknown, clandestine)
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clouded(obscure, unknown, clandestine, undisclosed)
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conspiratorial(obscure, unknown, clandestine, undisclosed)
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discreet(clandestine, undisclosed)
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disguised(obscure, unknown, clandestine, undisclosed)
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dissembled(clandestine, undisclosed)
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dissimulated(clandestine, undisclosed)
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in ambush(expression, clandestine, undisclosed)
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incognito(clandestine, undisclosed)
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inside(intimate, secret, private, clandestine)
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sly(adjective, sharp, clandestine, ironic)
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sneak(clandestine, undisclosed)
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sneaky(clandestine, undisclosed)
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sub-rosa(clandestine, undisclosed)
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unacknowledged(clandestine, undisclosed)
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under-the-table(clandestine, undisclosed)
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under false pretense(expression, idiom, clandestine, undisclosed)
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undercover(clandestine, undisclosed)
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APASmart Define. (2015). arcane thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/arcane/thesaurus/synonyms
ChicagoSmart Define. 2015. "arcane thesaurus" https://smartdefine.org/arcane/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, arcane thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/arcane/thesaurus/synonyms>.
MLASmart Define. "arcane thesaurus" 10 April 2015. Web. 25 September 2026. <https://smartdefine.org/arcane/thesaurus/synonyms>