Synonyms|224Antonyms|62|Broader|0Narrower|0Related|264

45 entries under underground topic. ×

1
unintelligible(obscure, unknown, clandestine, concealment)
0
backdoor(obscure, unknown, clandestine, unrevealed)
0
backstairs
0
camouflaged(obscure, unknown, clandestine, unrevealed)
0
cloak-and-dagger(obscure, unknown, clandestine, unrevealed)
0
closet(obscure, unknown, personal, clandestine)
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conspiratorial(obscure, unknown, clandestine, unrevealed)
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discreet(personal, clandestine, confidential, hush-hush)
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dissembled
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dissimulated
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enigmatical(obscure, unknown, clandestine, unrevealed)
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furtive(obscure, unknown, clandestine, unrevealed)
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in ambush(expression, clandestine)
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inside(personal, clandestine, confidential, hush-hush)
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on the QT(expression, idiom, obscure, unknown, clandestine)
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sly
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sneak
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sneaky
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stealthy
0
sub-rosa
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APASmart Define. (2015). undisclosed thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/undisclosed/thesaurus/synonyms
ChicagoSmart Define. 2015. "undisclosed thesaurus" https://smartdefine.org/undisclosed/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, undisclosed thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/undisclosed/thesaurus/synonyms>.
MLASmart Define. "undisclosed thesaurus" 14 April 2015. Web. 27 September 2026. <https://smartdefine.org/undisclosed/thesaurus/synonyms>