- Definitions|1
- Thesaurus|320
- Abbreviations|0
63 entries under underground topic. ×
| esoteric(clandestine, undisclosed) | |
| mysterious(clandestine, undisclosed) | |
| mystic(clandestine, undisclosed) | |
| mystical(clandestine, undisclosed) | |
| obscure(clandestine, undisclosed) | |
| obscured(secret, hidden, clandestine, underhanded) | |
| occult(clandestine, undisclosed) | |
| out-of-the-way(clandestine, undisclosed) | |
| recondite(clandestine, undisclosed) | |
| reticent(clandestine, undisclosed) | |
| retired(clandestine, undisclosed) | |
| secluded(clandestine, undisclosed) | |
| strange(clandestine, undisclosed) | |
| top-secret(secret, clandestine, undisclosed) | |
| ulterior(secret, hidden, clandestine, underhanded) | |
| undisclosed | |
| unenlightened(clandestine, undisclosed) | |
| unfrequented(clandestine, undisclosed) | |
| unintelligible(clandestine, undisclosed) | |
| unknown(clandestine, undisclosed) |
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| APA | Smart Define. (2015). under-the-table thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/under-the-table/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "under-the-table thesaurus" https://smartdefine.org/under-the-table/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2015, under-the-table thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/under-the-table/thesaurus/synonyms>. |
| MLA | Smart Define. "under-the-table thesaurus" 13 April 2015. Web. 27 September 2026. <https://smartdefine.org/under-the-table/thesaurus/synonyms> |