- Definitions|2
- Thesaurus|1.5k
- Abbreviations|0
| unfathomable | |
| unintelligible(clandestine, underground, undisclosed, concealment) | |
| unpublished(adjective, clandestine, underground, undisclosed) | |
| unseen(adjective, secret, unknown, hidden, imperceptible) | |
| cloak | |
| abandoned(close, quiet, private, isolated, secluded) | |
| abri | |
| aerie | |
| air-raid shelter | |
| alchemistic(strange, unknown, curious, concealed, inexplicable) | |
| aloof(close, quiet, private, isolated, secluded) | |
| anonymously | |
| arbor | |
| armored | |
| artful(mean, smooth, cunning, knowing, sly) | |
| astrological(strange, unknown, curious, concealed, inexplicable) | |
| back door | |
| backdoor(clandestine, underground, undisclosed) | |
| backstair | |
| baldachin |
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| APA | Smart Define. (2015). covert thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/covert/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "covert thesaurus" https://smartdefine.org/covert/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2015, covert thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/covert/thesaurus/synonyms>. |
| MLA | Smart Define. "covert thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/covert/thesaurus/synonyms> |