9 entries under underhandedly topic. ×

11
slyly(noun, adverb, clandestine, quietly, secretly)
6
clandestinely(noun, adverb, clandestine, quietly, secretly)
5
sub rosa(expression, adverb, clandestine, quietly, personally)
1
hush-hush(clandestine, quietly, secretly, personally, privately)
1
under wraps(expression, clandestine, secretly, slyly)
1
undercover(clandestine, secretly, slyly, incognito)
1
wildcat(clandestine, secretly, slyly, surreptitiously)
0
clandestine(secretly, slyly, surreptitiously)
0
under cover(expression, clandestine, incognito)
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APASmart Define. (2015). furtively thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/furtively/thesaurus/synonyms
ChicagoSmart Define. 2015. "furtively thesaurus" https://smartdefine.org/furtively/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, furtively thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/furtively/thesaurus/synonyms>.
MLASmart Define. "furtively thesaurus" 13 April 2015. Web. 29 September 2026. <https://smartdefine.org/furtively/thesaurus/synonyms>