0
surreptitious
0
swipe
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thieving
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thievishly
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traitorously
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treacherously
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under cover(expression, clandestine, underhandedly)
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underhand
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unfairly
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unnoticed(adverb, unobtrusively)
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APASmart Define. (2015). surreptitiously thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/surreptitiously/thesaurus/synonyms
ChicagoSmart Define. 2015. "surreptitiously thesaurus" https://smartdefine.org/surreptitiously/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, surreptitiously thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/surreptitiously/thesaurus/synonyms>.
MLASmart Define. "surreptitiously thesaurus" 10 April 2015. Web. 28 September 2026. <https://smartdefine.org/surreptitiously/thesaurus/synonyms>