5 entries under surreptitiously topic. ×

4
furtively(noun, adverb, secretly, slyly)
4
insidiously(adjective, adverb, secretly, slyly)
4
slyly(noun, adverb, secretly, furtively, deceitfully)
3
secretly(adverb, furtively, slyly)
3
stealthily(noun, adverb, secretly, furtively, slyly)
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APASmart Define. (2015). sneakily thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/sneakily/thesaurus/synonyms
ChicagoSmart Define. 2015. "sneakily thesaurus" https://smartdefine.org/sneakily/thesaurus/synonyms (accessed October 1, 2026).
HarvardSmart Define 2015, sneakily thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/sneakily/thesaurus/synonyms>.
MLASmart Define. "sneakily thesaurus" 13 April 2015. Web. 1 October 2026. <https://smartdefine.org/sneakily/thesaurus/synonyms>