130 entries under secret topic. ×
| screened(close, quiet, unknown, isolated) | |
| silent(reserved, mysterious, reticent, sneak) | |
| skulking(adjective, hidden, sneak, sneaky) | |
| sub-rosa(hidden, spy, underground, sneak) | |
| under-the-table(hidden, clandestine, underground, sneaky) | |
| under cover(expression, adjective, isolated, spy) | |
| under wraps(expression, hidden, clandestine, underground) | |
| unknown(obscure, hidden, immense, concealed) | |
| unseen(adjective, obscure, unknown, hidden) | |
| backdoor(obscure, intimate, unknown, clandestine) | |
| creep(hidden, spy, covert) | |
| elemental(adjective, penetrating, personal, innermost) | |
| essential(adjective, individual, mental, specific) | |
| experienced(adjective, penetrating, personal, innermost) | |
| firsthand(adjective, penetrating, personal, innermost) | |
| immediate(adjective, penetrating, personal, innermost) | |
| in-depth(adjective, penetrating, personal, innermost) | |
| inborn(adjective, individual, specific, typical) | |
| inbred(adjective, individual, specific, typical) | |
| intelligence(hidden, spy, covert) |
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| APA | Smart Define. (2016). private thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/private/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "private thesaurus" https://smartdefine.org/private/thesaurus/synonyms (accessed September 28, 2026). |
| Harvard | Smart Define 2016, private thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/private/thesaurus/synonyms>. |
| MLA | Smart Define. "private thesaurus" 26 February 2016. Web. 28 September 2026. <https://smartdefine.org/private/thesaurus/synonyms> |