15 entries under noun topic. ×

9
covertly(adverb, show, quietly, secretly)
7
on the sly(expression, idiom, adverb, show)
7
surreptitiously(adverb, clandestine, quietly, secretly)
6
furtively(adverb, clandestine, quietly, secretly)
6
stealthily(adverb, clandestine, quietly, secretly)
3
on the q.t
3
or Q.T.
3
quietly(adverb, secretly, personally, privately)
3
slyly(adverb, clandestine, quietly, secretly)
3
sneakily
2
underhandedly(adverb, clandestine, quietly, secretly)
1
sly
0
backdoor
0
on the side
0
slily
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APASmart Define. (2013). clandestinely thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/clandestinely/thesaurus/synonyms
ChicagoSmart Define. 2013. "clandestinely thesaurus" https://smartdefine.org/clandestinely/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2013, clandestinely thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/clandestinely/thesaurus/synonyms>.
MLASmart Define. "clandestinely thesaurus" 17 June 2013. Web. 26 September 2026. <https://smartdefine.org/clandestinely/thesaurus/synonyms>