260 entries under adjective topic. ×

6
sly(false, corrupt, dishonest, deceitful)
6
underhand(false, corrupt, dishonest, immoral)
6
unprincipled(false, dishonest, immoral, deceitful)
6
wicked(mean, base, false, dishonest)
5
dirty(hard, rough, nasty, rude)
5
disingenuous(false, dishonest, deceitful, slick)
5
fickle(false, dishonest, dubious, untrue)
5
knavish(hard, evil, rough, nasty)
5
unfair(false, corrupt, dishonest, immoral)
4
bent(false, dishonest, immoral, deceitful)
4
disaffected(untrue, untrustworthy, treacherous, unfaithful)
4
dishonorable(mean, bad, hard, evil)
4
dissembling(noun, wrong, false, dishonest)
4
fake(false, dishonest, slick, hypocritical)
4
false-hearted(continue, false, dishonest, trust)
4
foxy
4
malevolent(mean, bad, evil, base)
4
punic
4
seditious(untrue, untrustworthy, treacherous, unfaithful)
4
shady(false, dishonest, immoral, deceitful)
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APASmart Define. (2016). perfidious thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/perfidious/thesaurus/synonyms
ChicagoSmart Define. 2016. "perfidious thesaurus" https://smartdefine.org/perfidious/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, perfidious thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/perfidious/thesaurus/synonyms>.
MLASmart Define. "perfidious thesaurus" 4 March 2016. Web. 26 September 2026. <https://smartdefine.org/perfidious/thesaurus/synonyms>