14 entries under noun topic. ×

13
furtively(adverb, close, hideaway, arcane)
12
stealthily(adverb, close, hideaway, arcane)
11
covertly(adverb, close, hideaway, arcane)
8
on the sly(expression, idiom, adverb, clandestine)
8
underhandedly(adverb, close, hideaway, arcane)
7
sneakily
6
clandestinely(adverb, clandestine, quietly, secretly)
5
slyly(adverb, clandestine, quietly, secretly)
3
on the q.t
3
or Q.T.
3
quietly(adverb, secretly, personally, privately)
1
sly
0
on the side
0
slily
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APASmart Define. (2015). surreptitiously thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/surreptitiously/thesaurus/synonyms
ChicagoSmart Define. 2015. "surreptitiously thesaurus" https://smartdefine.org/surreptitiously/thesaurus/synonyms (accessed October 1, 2026).
HarvardSmart Define 2015, surreptitiously thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/surreptitiously/thesaurus/synonyms>.
MLASmart Define. "surreptitiously thesaurus" 10 April 2015. Web. 1 October 2026. <https://smartdefine.org/surreptitiously/thesaurus/synonyms>