Synonyms|358Antonyms|119|Broader|7Narrower|1Related|1.3k

110 entries under untrustworthy topic. ×

2
cheating(adjective, false, dishonest, deceitful, lying)
2
double-crossing(adjective, wrong, false, dishonest, deceitful)
2
estranged(adjective, untrue, treacherous, unfaithful)
2
falsehearted(adjective, mean, bad, evil, low)
2
iniquitous(adjective, dishonest, immoral, rotten)
2
mercenary(adjective, dishonest, immoral, rotten)
2
unethical(adjective, dishonest, immoral, deceitful, rotten)
2
unloyal(adjective, false, dishonest, dubious, unsound)
2
unpatriotic(adjective, fickle, untrue, unprincipled)
1
adulterine(adjective, false, fickle, untrue)
1
adulterous(adjective, false, fickle, untrue)
1
amoral(adjective, fickle, unprincipled, dirty-dealing)
1
bribable(adjective, dishonest, immoral, rotten)
1
changeful(adjective, false, dishonest, dubious, fickle)
1
committing perjury(expression, adjective, wrong, false, dishonest)
1
debauched(adjective, dishonest, immoral, rotten)
1
exploiting(adjective, dishonest, immoral, rotten)
1
extortionate(adjective, dishonest, immoral, rotten)
1
fast and loose(expression, adjective, idiom, dishonest, immoral)
1
fixed(adjective, dishonest, immoral, rotten)
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ChicagoSmart Define. 2016. "perfidious thesaurus" https://smartdefine.org/perfidious/thesaurus/synonyms (accessed October 1, 2026).
HarvardSmart Define 2016, perfidious thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/perfidious/thesaurus/synonyms>.
MLASmart Define. "perfidious thesaurus" 4 March 2016. Web. 1 October 2026. <https://smartdefine.org/perfidious/thesaurus/synonyms>