20
secretly(adverb, close, hideaway, arcane, stealth)
14
stealthily(noun, adverb, close, hideaway, arcane)
13
privately(adverb, close, hideaway, arcane, stealth)
13
surreptitiously(noun, adverb, close, hideaway, arcane)
11
slyly(noun, adverb, clandestine, quietly, secretly)
10
covertly(noun, adverb, close, hideaway, arcane)
8
underhandedly(noun, adverb, close, hideaway, arcane)
7
on the sly(noun, expression, idiom, adverb, clandestine)
7
sneakily(noun, adverb, secretly, slyly, surreptitiously)
6
clandestinely(noun, adverb, clandestine, quietly, secretly)
6
secretively(adverb, close, hideaway, arcane, stealth)
5
latently(adverb, close, hideaway, arcane, stealth)
5
quietly(noun, adverb, secretly, personally, privately)
5
sub rosa(expression, adverb, clandestine, quietly, personally)
3
back
3
craftily
3
cryptically
3
in secret(expression, idiom, adverb)
3
insidiously(quietly, secretly, personally, privately, slyly)
3
mysteriously(adverb, secretively)
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APASmart Define. (2015). furtively thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/furtively/thesaurus/synonyms
ChicagoSmart Define. 2015. "furtively thesaurus" https://smartdefine.org/furtively/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, furtively thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/furtively/thesaurus/synonyms>.
MLASmart Define. "furtively thesaurus" 13 April 2015. Web. 21 September 2026. <https://smartdefine.org/furtively/thesaurus/synonyms>