- Definitions|1
- Thesaurus|435
- Abbreviations|0
52 entries under underground topic. ×
| secret(adjective, quiet, show, separate, dishonest) | |
| confidential(adjective, show, separate, intimate, secret) | |
| hidden(adjective, quiet, separate, reserved, secret) | |
| classified(noun, adjective, intimate, secret, private) | |
| cloak-and-dagger(adjective, show, full, secret, clandestine) | |
| concealed(adjective, separate, dishonest, secret, hidden) | |
| restricted(adjective, close, secret, hidden, clandestine) | |
| undisclosed(adjective, personal, clandestine, confidential) | |
| arcane(intimate, secret, private, clandestine) | |
| close(adjective, quiet, reserved, intimate, secret) | |
| top secret(noun, expression, adjective, secret, restricted) | |
| backstairs(clandestine, undisclosed) | |
| cloaked(secret, hidden, concealed, sneaky) | |
| cryptic(clandestine, undisclosed) | |
| esoteric(clandestine, undisclosed) | |
| mysterious(quiet, clandestine, undisclosed, intriguing) | |
| mystical(clandestine, undisclosed) | |
| occult(clandestine, undisclosed) | |
| secretive(adjective, quiet, dishonest, cunning, deceitful) | |
| sneak(clandestine, undisclosed, skulking) |
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| APA | Smart Define. (2015). hush-hush thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/hush-hush/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "hush-hush thesaurus" https://smartdefine.org/hush-hush/thesaurus/synonyms (accessed September 29, 2026). |
| Harvard | Smart Define 2015, hush-hush thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/hush-hush/thesaurus/synonyms>. |
| MLA | Smart Define. "hush-hush thesaurus" 13 April 2015. Web. 29 September 2026. <https://smartdefine.org/hush-hush/thesaurus/synonyms> |