- Definitions|1
- Thesaurus|860
- Abbreviations|0
62 entries under secret topic. ×
| surreptitious(adjective, dishonest, hidden, spy) | |
| clandestine(adjective, adverb, show, dishonest) | |
| covert(adjective, show, reticent, hidden) | |
| hush-hush(adjective, adverb, show, informal, dishonest) | |
| underground(adjective, unknown, hidden, spy) | |
| furtive(adjective, dishonest, reticent, hidden) | |
| hidden(adjective, spy, clandestine, underground) | |
| hole-and-corner(adjective, private, hidden, spy) | |
| confidential(adjective, hidden, spy, clandestine) | |
| private(adjective, unknown, hidden, spy) | |
| stealthy(adjective, quiet, dishonest, hidden) | |
| underhand(adjective, deceitful, hidden, spy) | |
| concealed(adjective, obscure, dishonest, hidden) | |
| under wraps(expression, adjective, idiom, show, dishonest) | |
| secluded(adjective, unknown, hidden, underground) | |
| cloak-and-dagger(adjective, show, full, sly) | |
| spy(adjective, warning, hidden, covert) | |
| occult(unknown, hidden, underground, concealed) | |
| underhanded(dishonest, cunning, deceitful, hidden) | |
| buried(adjective, unknown, hidden, concealed) |
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| APA | Smart Define. (2015). undercover thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/undercover/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "undercover thesaurus" https://smartdefine.org/undercover/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2015, undercover thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/undercover/thesaurus/synonyms>. |
| MLA | Smart Define. "undercover thesaurus" 13 April 2015. Web. 27 September 2026. <https://smartdefine.org/undercover/thesaurus/synonyms> |