12 entries under underhandedly topic. ×

10
secretly(adverb, show, clandestine, secretly, furtively)
7
surreptitiously(noun, adverb, clandestine, quietly, secretly)
6
furtively(noun, adverb, clandestine, quietly, secretly)
6
stealthily(noun, adverb, clandestine, quietly, secretly)
5
privately(adverb, clandestine, quietly, secretly, personally)
4
sub rosa(adverb, show, clandestine, quietly, secretly)
3
slyly(noun, adverb, clandestine, quietly, secretly)
2
clandestine(adjective, adverb, secretly, slyly)
1
hush-hush(adjective, adverb, clandestine, quietly, secretly)
1
under wraps(expression, adverb, clandestine, secretly, slyly)
1
undercover(adjective, adverb, clandestine, secretly, furtively)
1
wildcat(adverb, clandestine, secretly, slyly)
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APASmart Define. (2013). clandestinely thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/clandestinely/thesaurus/synonyms
ChicagoSmart Define. 2013. "clandestinely thesaurus" https://smartdefine.org/clandestinely/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2013, clandestinely thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/clandestinely/thesaurus/synonyms>.
MLASmart Define. "clandestinely thesaurus" 17 June 2013. Web. 23 September 2026. <https://smartdefine.org/clandestinely/thesaurus/synonyms>