16
perfidy(noun, continue, fake, deception, doubt)
14
treachery(noun, continue, fake, deception, doubt)
10
disloyalty(noun, continue, deception, doubt, trust)
9
falsity(noun, continue, deception, doubt, trust)
7
faithlessness(noun, continue, fake, deception, doubt)
7
falseness(noun, continue, fake, doubt, trust)
7
infidelity(noun, continue, fake, deception, doubt)
6
duplicity(noun, fake, deception, dishonesty, treachery)
6
treason(noun, fake, doubt, dishonesty, treachery)
6
unfaithfulness(noun, continue, deception, doubt, trust)
5
dishonesty(noun, deception, doubt, treachery, cunning)
5
duality(deception, division, dishonesty, deceit, falsehood)
4
double-dealing(noun, fake, deception, dishonesty, treachery)
3
betrayal(noun, fake, deception, doubt, dishonesty)
3
deceit(noun, deception, dishonesty, treachery, fraud)
3
dirty trick(noun, expression, fake, deception, division)
3
dirty work(noun, expression, fake, deception, dishonesty)
3
foul play(noun, expression, idiom, improbity)
3
guile(noun, deception, dishonesty, treachery, fraud)
3
inconstancy(noun, doubt, dishonesty, treachery, deceit)
<1234510>
11 years ago|2.8k views|share |citing 
APASmart Define. (2015). perfidiousness thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/perfidiousness/thesaurus/synonyms
ChicagoSmart Define. 2015. "perfidiousness thesaurus" https://smartdefine.org/perfidiousness/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, perfidiousness thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/perfidiousness/thesaurus/synonyms>.
MLASmart Define. "perfidiousness thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/perfidiousness/thesaurus/synonyms>