| in ambush(expression, clandestine, underground, undisclosed) | |
| incognito(clandestine, underground, undisclosed) | |
| inner | |
| inside(clandestine, underground, undisclosed) | |
| interior | |
| loose-leaf | |
| manuscript | |
| mysterious(obscure, unknown, clandestine, underground, undisclosed) | |
| mystical(obscure, unknown, clandestine, underground, undisclosed) | |
| not circulated(adjective, published) | |
| not disclosed | |
| not edited(expression, idiom) | |
| not expressed(expression, idiom, latency implication) | |
| not in print(adjective, published) | |
| not printed(adjective, published) | |
| not published(expression, idiom) | |
| not yet announced(expression, idiom) | |
| occult(obscure, unknown, clandestine, underground, undisclosed) | |
| on the QT(expression, idiom, obscure, unknown, clandestine) | |
| personal |
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| APA | Smart Define. (2015). unpublished thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/unpublished/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "unpublished thesaurus" https://smartdefine.org/unpublished/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, unpublished thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/unpublished/thesaurus/synonyms>. |
| MLA | Smart Define. "unpublished thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/unpublished/thesaurus/synonyms> |