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10
secretly(adverb, clandestine, secretly, furtively)
9
covertly(noun, adverb, quietly, secretly)
7
on the sly(noun, expression, idiom, adverb)
4
sub rosa(adverb, clandestine, quietly, secretly)
3
by stealth(expression, idiom, adverb, clandestine)
2
huggermugger(adverb, secretly)
2
under cover(expression, idiom, adverb, clandestine)
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APASmart Define. (2013). clandestinely thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/clandestinely/thesaurus/synonyms
ChicagoSmart Define. 2013. "clandestinely thesaurus" https://smartdefine.org/clandestinely/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2013, clandestinely thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/clandestinely/thesaurus/synonyms>.
MLASmart Define. "clandestinely thesaurus" 17 June 2013. Web. 24 September 2026. <https://smartdefine.org/clandestinely/thesaurus/synonyms>