- Definitions|1
- Thesaurus|860
- Abbreviations|0
55 entries under hidden topic. ×
| surreptitious(adjective, dishonest, secret, spy) | |
| clandestine(adjective, adverb, show, dishonest, secret) | |
| secret(adjective, quiet, show, dishonest) | |
| covert(adjective, show, secret, reticent) | |
| hush-hush(adjective, adverb, show, informal, dishonest) | |
| underground(adjective, secret, unknown, spy) | |
| furtive(adjective, dishonest, secret, reticent) | |
| hole-and-corner(adjective, secret, private, spy) | |
| confidential(adjective, secret, spy, clandestine) | |
| private(adjective, secret, unknown, spy) | |
| stealthy(adjective, quiet, dishonest, secret) | |
| underhand(adjective, deceitful, secret, spy) | |
| concealed(adjective, obscure, dishonest, secret) | |
| under wraps(expression, adjective, idiom, show, dishonest) | |
| secluded(adjective, secret, unknown, underground) | |
| spy(adjective, secret, warning, covert) | |
| occult(secret, unknown, underground, concealed) | |
| underhanded(dishonest, cunning, deceitful, secret) | |
| buried(adjective, secret, unknown, concealed) | |
| clouded(secret, unknown, underground, concealed) |
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| APA | Smart Define. (2015). undercover thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/undercover/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "undercover thesaurus" https://smartdefine.org/undercover/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, undercover thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/undercover/thesaurus/synonyms>. |
| MLA | Smart Define. "undercover thesaurus" 13 April 2015. Web. 23 September 2026. <https://smartdefine.org/undercover/thesaurus/synonyms> |