68 entries under clandestine topic. ×
| dissembled(close, underground, undisclosed, furtive) | |
| dissimulated(close, inside, underground, undisclosed) | |
| furtive(close, underground, undisclosed) | |
| in ambush(expression, adjective, close, sensitive, inside) | |
| incognito(close, underground, undisclosed, furtive) | |
| inside(close, private, underground, undisclosed) | |
| secretive(underground, undisclosed) | |
| sly(underground, undisclosed) | |
| sneak(close, inside, underground, undisclosed) | |
| sneaky(underground, undisclosed) | |
| stealthy(underground, undisclosed) | |
| sub-rosa(adjective, close, sensitive, underground) | |
| surreptitious(underground, undisclosed) | |
| unacknowledged(adjective, close, sensitive, inside) | |
| under-the-table(adjective, sensitive, underground, undisclosed) | |
| under false pretense(expression, adjective, idiom, close, sensitive) | |
| underhanded(underground, undisclosed) | |
| abstruse(underground, undisclosed) | |
| ambiguous(underground, undisclosed) | |
| cloak-and-dagger(underground, undisclosed) |
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| APA | Smart Define. (2015). top secret thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/top_secret/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "top secret thesaurus" https://smartdefine.org/top_secret/thesaurus/synonyms (accessed September 30, 2026). |
| Harvard | Smart Define 2015, top secret thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/top_secret/thesaurus/synonyms>. |
| MLA | Smart Define. "top secret thesaurus" 14 April 2015. Web. 30 September 2026. <https://smartdefine.org/top_secret/thesaurus/synonyms> |