76 entries under adverb topic. ×

18
furtively(close, hideaway, arcane, stealth)
16
covertly(close, show, hideaway, arcane)
16
stealthily(close, hideaway, arcane, stealth)
16
surreptitiously(close, hideaway, arcane, stealth)
14
privately(close, hideaway, arcane, stealth)
12
clandestinely(show, clandestine, furtively, slyly)
11
in secret(expression, idiom, concealment, slyly)
9
confidentially
9
slyly(clandestine, furtively, underhandedly, surreptitiously)
8
on the sly(expression, idiom, show, clandestine)
7
quietly
7
underhandedly(close, hideaway, arcane, stealth)
6
incognito(close, hideaway, arcane, stealth)
6
intimately
6
personally(closely, privately, slyly, confidentially)
5
by stealth(expression, idiom, show, clandestine)
5
latently(close, hideaway, arcane, stealth)
5
secretively(close, hideaway, arcane, stealth)
5
sub rosa(expression, show, clandestine, slyly)
4
hiddenly
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APASmart Define. (2016). secretly thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/secretly/thesaurus/synonyms
ChicagoSmart Define. 2016. "secretly thesaurus" https://smartdefine.org/secretly/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, secretly thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/secretly/thesaurus/synonyms>.
MLASmart Define. "secretly thesaurus" 19 February 2016. Web. 26 September 2026. <https://smartdefine.org/secretly/thesaurus/synonyms>