- Definitions|2
- Thesaurus|503
- Abbreviations|0
| restricted(clandestine, underground, undisclosed) | |
| secreted | |
| secretiveness | |
| sly(clandestine, underground, undisclosed) | |
| sneak(clandestine, underground, undisclosed) | |
| sneaky(clandestine, underground, undisclosed) | |
| stealthy(clandestine, underground, undisclosed) | |
| strange(obscure, unknown, clandestine, underground, undisclosed) | |
| sub-rosa(clandestine, underground, undisclosed) | |
| supposition | |
| surreptitious(secret, unknown, hidden, underground, concealed) | |
| top-secret(clandestine, underground, undisclosed) | |
| top secret(expression, clandestine, underground, undisclosed) | |
| trust | |
| unattended | |
| uncared-for | |
| under-the-table(clandestine, underground, undisclosed) | |
| under cover(expression, obscure, dark) | |
| under false pretense(expression, idiom, clandestine, underground, undisclosed) | |
| underhand(clandestine, underground, undisclosed) |
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| APA | Smart Define. (2015). unseen thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/unseen/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "unseen thesaurus" https://smartdefine.org/unseen/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2015, unseen thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/unseen/thesaurus/synonyms>. |
| MLA | Smart Define. "unseen thesaurus" 10 April 2015. Web. 25 September 2026. <https://smartdefine.org/unseen/thesaurus/synonyms> |