8
furtively(noun, adverb, close, hideaway, arcane)
8
secretly(adverb, close, hideaway, arcane, stealth)
7
stealthily(noun, adverb, close, hideaway, arcane)
7
surreptitiously(noun, adverb, close, hideaway, arcane)
6
covertly(noun, adverb, close, hideaway, arcane)
5
privately(adverb, close, hideaway, arcane, stealth)
4
deceitfully(adverb, dishonestly)
4
underhand
3
clandestinely(noun, adverb, clandestine, quietly, secretly)
3
craftily(adverb, dishonestly)
3
deviously(adverb, dishonestly)
3
dishonorably(adverb, dishonestly)
3
slyly(noun, adverb, clandestine, quietly, secretly)
2
corruptly(adverb, dishonestly)
2
dishonestly(adverb, dishonestly)
2
falsely
2
fraudulently(adverb, dishonestly)
2
hypocritically(adverb, dishonestly)
2
immorally(adverb, dishonestly)
2
insincerely(adverb, dishonestly)
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APASmart Define. (2015). underhandedly thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/underhandedly/thesaurus/synonyms
ChicagoSmart Define. 2015. "underhandedly thesaurus" https://smartdefine.org/underhandedly/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, underhandedly thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/underhandedly/thesaurus/synonyms>.
MLASmart Define. "underhandedly thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/underhandedly/thesaurus/synonyms>