Synonyms|358Antonyms|72|Broader|2Narrower|0Related|322

62 entries under secret topic. ×

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unauthorized(adjective, sneaky)
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unseen(unknown, hidden, underground, concealed)
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APASmart Define. (2015). surreptitious thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/surreptitious/thesaurus/synonyms
ChicagoSmart Define. 2015. "surreptitious thesaurus" https://smartdefine.org/surreptitious/thesaurus/synonyms (accessed October 1, 2026).
HarvardSmart Define 2015, surreptitious thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/surreptitious/thesaurus/synonyms>.
MLASmart Define. "surreptitious thesaurus" 13 April 2015. Web. 1 October 2026. <https://smartdefine.org/surreptitious/thesaurus/synonyms>