13
craftily(adverb, cunningly, wittily, deceitfully, intuitively)
13
cunningly(adverb, cunning, carefully, cunningly, coolly)
11
artfully(adverb, carefully, cunningly, coolly, wittily)
11
furtively(noun, adverb, clandestine, quietly, secretly)
10
trickily(adverb, cunningly, wittily, intuitively)
9
secretly(adverb, clandestine, furtively, underhandedly, surreptitiously)
8
foxily(adverb, cunningly, wittily)
8
astutely(adverb, cunningly, wittily, intuitively)
8
stealthily(noun, adverb, clandestine, quietly, secretly)
7
archly
7
cannily(adverb, cunningly, wittily, intuitively)
7
clandestinely(noun, adverb, clandestine, quietly, secretly)
7
knavishly
6
deviously(adverb, cunningly)
6
on the sly(noun, expression, idiom, adverb, cunning)
6
shrewdly(adverb, cunningly, wittily, intuitively)
6
surreptitiously(noun, adverb, clandestine, quietly, secretly)
5
cleverly(adverb, cunningly, wittily, intuitively)
4
back
4
covertly(noun, adverb, quietly, secretly, personally)
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APASmart Define. (2015). slyly thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/slyly/thesaurus/synonyms
ChicagoSmart Define. 2015. "slyly thesaurus" https://smartdefine.org/slyly/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, slyly thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/slyly/thesaurus/synonyms>.
MLASmart Define. "slyly thesaurus" 13 April 2015. Web. 21 September 2026. <https://smartdefine.org/slyly/thesaurus/synonyms>