15 entries under underhandedly topic. ×

7
in camera(expression, idiom, adverb, clandestine, quietly)
6
clandestinely(adverb, clandestine, quietly, secretly, personally)
5
sub rosa(expression, adverb, clandestine, quietly, secretly)
3
by stealth(expression, idiom, clandestine, quietly, secretly)
3
on the sly(expression, idiom, adverb, clandestine, quietly)
2
slyly(adverb, clandestine, quietly, secretly, personally)
1
hush-hush(clandestine, quietly, secretly, personally, slyly)
1
in holes and corners(expression, clandestine, quietly, secretly, personally)
1
on the QT(expression, clandestine, quietly, secretly, personally)
1
on the quiet(expression, clandestine, quietly, secretly, personally)
1
undercover(clandestine, secretly, slyly, surreptitiously)
0
clandestine(secretly, slyly, surreptitiously)
0
under cover(expression, clandestine)
0
under wraps(expression, clandestine, secretly, slyly)
0
wildcat(clandestine, secretly, slyly, surreptitiously)
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APASmart Define. (2015). privately thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/privately/thesaurus/synonyms
ChicagoSmart Define. 2015. "privately thesaurus" https://smartdefine.org/privately/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, privately thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/privately/thesaurus/synonyms>.
MLASmart Define. "privately thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/privately/thesaurus/synonyms>