Synonyms|16Antonyms|0|Broader|0Narrower|0Related|0
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clandestinely
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confidentially
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covertly
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furtively
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in secret
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mysteriously
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on the q.t
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on the sly
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or Q.T.
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privately
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quietly
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secretly
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slyly
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stealthily
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sub rosa
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surreptitiously
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APASmart Define. (2011). sub sigillo thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/sub_sigillo/thesaurus/synonyms
ChicagoSmart Define. 2011. "sub sigillo thesaurus" https://smartdefine.org/sub_sigillo/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2011, sub sigillo thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/sub_sigillo/thesaurus/synonyms>.
MLASmart Define. "sub sigillo thesaurus" 29 May 2011. Web. 21 September 2026. <https://smartdefine.org/sub_sigillo/thesaurus/synonyms>