9
heathen(adjective, sinful, ungodly, irreligious, unbelieving)
9
two-faced(adjective, mean, base, false, dishonest)
8
atheistic(adjective, ungodly, irreligious, unbelieving, unspiritual)
8
corrupt(adjective, mean, bad, evil, base)
8
dubious(adjective, uncertain, dishonest, unsettled, hesitant)
8
slippery(adjective, false, dishonest, deceitful, unreliable)
8
unscrupulous(adjective, mean, base, dishonest, immoral)
7
capricious(adjective, false, dishonest, deceitful, unreliable)
7
crooked(adjective, mean, base, false, dishonest)
7
cunning(adjective, lying, misleading)
7
double-dealing(noun, adjective, mean, base, false)
7
insincere(adjective, dishonest, lying, misleading, hypocritical)
7
shifty(noun, adjective, false, dishonest, cunning)
6
changeable(adjective, dishonest, untrue, untrustworthy, frivolous)
6
dishonourable
6
duplicitous(noun, adjective, mean, base, false)
6
undependable(adjective, false, dishonest, deceitful, unreliable)
6
unstable(adjective, dishonest, changeable, untrustworthy, indecisive)
6
wavering(adjective, uncertain, dishonest, unsettled, hesitant)
5
changeful(adjective, dishonest, fickle, untrustworthy, unprincipled)
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APASmart Define. (2015). faithless thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/faithless/thesaurus/synonyms
ChicagoSmart Define. 2015. "faithless thesaurus" https://smartdefine.org/faithless/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, faithless thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/faithless/thesaurus/synonyms>.
MLASmart Define. "faithless thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/faithless/thesaurus/synonyms>