49 entries under underground topic. ×

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cloak-and-dagger(obscure, unknown, clandestine, undisclosed)
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closet(obscure, unknown, clandestine, undisclosed)
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conspiratorial(obscure, unknown, clandestine, undisclosed)
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stealthy(clandestine, undisclosed)
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underhand(clandestine, undisclosed)
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underhanded(clandestine, undisclosed)
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unenlightened(obscure, unknown, clandestine, undisclosed)
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unfrequented(obscure, unknown, clandestine, undisclosed)
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unpublished(obscure, unknown, clandestine, undisclosed)
<123>
10 years ago|18k views|share |citing 
APASmart Define. (2016). cryptic thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/cryptic/thesaurus/synonyms
ChicagoSmart Define. 2016. "cryptic thesaurus" https://smartdefine.org/cryptic/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, cryptic thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/cryptic/thesaurus/synonyms>.
MLASmart Define. "cryptic thesaurus" 29 March 2016. Web. 22 September 2026. <https://smartdefine.org/cryptic/thesaurus/synonyms>