14 entries under surreptitiously topic. ×

9
secretly(adverb, clandestine, furtively, underhandedly)
4
covertly(noun, adverb, quietly, secretly, personally)
4
quietly(noun, adverb, secretly, personally, privately)
2
insidiously(quietly, secretly, personally, privately, furtively)
2
sneakily(noun, adverb, secretly, furtively, deceitfully)
1
intimately(quietly, secretly, personally, privately, furtively)
1
obscurely(quietly, secretly, personally, privately, furtively)
1
privily(quietly, secretly, personally, privately, furtively)
1
unobserved(quietly, secretly, personally, privately, furtively)
0
behind your back(adverb, secretly)
0
clandestine(secretly, underhandedly)
0
under wraps(expression, clandestine, secretly, underhandedly)
0
undercover(clandestine, secretly, underhandedly)
0
wildcat(clandestine, secretly, underhandedly)
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APASmart Define. (2015). slyly thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/slyly/thesaurus/synonyms
ChicagoSmart Define. 2015. "slyly thesaurus" https://smartdefine.org/slyly/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, slyly thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/slyly/thesaurus/synonyms>.
MLASmart Define. "slyly thesaurus" 13 April 2015. Web. 29 September 2026. <https://smartdefine.org/slyly/thesaurus/synonyms>