15 entries under hidden topic. ×
| furtive(adjective, legal, fraudulent, forbidden) | |
| under-the-counter(sly, illegal, fraudulent, illegitimate) | |
| fraudulent(adjective, sly) | |
| underhand(adjective, fraudulent) | |
| artful(sly, fraudulent) | |
| cloak-and-dagger(sly, fraudulent) | |
| cloak and dagger(expression, idiom, fraudulent) | |
| closet(sly, fraudulent) | |
| concealed | |
| foxy(sly, fraudulent) | |
| in holes and corners(expression, idiom, sly, fraudulent) | |
| on the quiet(expression, idiom, sly, fraudulent) | |
| private | |
| under wraps(expression, fraudulent) | |
| underground |
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| APA | Smart Define. (2015). illicit thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/illicit/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "illicit thesaurus" https://smartdefine.org/illicit/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, illicit thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/illicit/thesaurus/synonyms>. |
| MLA | Smart Define. "illicit thesaurus" 13 April 2015. Web. 22 September 2026. <https://smartdefine.org/illicit/thesaurus/synonyms> |