333 entries under adjective topic. ×
| sly(quiet, dishonest, deceitful, clever) | |
| cloak-and-dagger(show, full, hidden, clandestine) | |
| incomprehensible(obscure, dark, strange, uncertain) | |
| inmost(intimate, private, penetrating, personal) | |
| lonely(close, quiet, remote, private) | |
| off the record(expression, idiom, separate, private) | |
| strange(property, new, remote, odd) | |
| under wraps(expression, idiom, adverb, show) | |
| underhanded(dishonest, cunning, deceitful, clandestine) | |
| unseen(unknown, hidden, covered, dormant) | |
| autogenous(inside, central, interior, inner) | |
| buried(separate, unknown, hidden, concealed) | |
| domestic(inside, central, interior, inner) | |
| endogenous(inside, central, interior, inner) | |
| guarded(intimate, private, hidden, personal) | |
| home(inside, central, interior, inner) | |
| in-house(inside, central, interior, inner) | |
| individual(private, mental, personal, inner) | |
| indwelling(intimate, private, penetrating, personal) | |
| ingrained(intimate, private, penetrating, personal) |
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| APA | Smart Define. (2016). secret thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/secret/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "secret thesaurus" https://smartdefine.org/secret/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2016, secret thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/secret/thesaurus/synonyms>. |
| MLA | Smart Define. "secret thesaurus" 31 March 2016. Web. 27 September 2026. <https://smartdefine.org/secret/thesaurus/synonyms> |