25
heathen(noun, adjective, not, irreligion, unbelieving)
22
atheist(noun, adjective, person, view, disbelieve)
20
pagan(noun, adjective, person, irreligious, nonbeliever)
17
agnostic(noun, adjective, irreligion, unbelieving, unbeliever)
12
gentile(noun, adjective, irreligion, nonbeliever)
11
unbeliever(noun, irreligion, unbeliever, nonbeliever)
9
heretic(noun, adjective, unbeliever, nonbeliever)
8
freethinker(noun, radical, irreligion)
7
disbeliever(noun, unbeliever)
7
faithless(adjective, unbelieving)
7
irreligious(adjective, unbelieving)
6
godless
5
heretical(adjective, unorthodox)
5
nonbeliever(noun, unbeliever)
5
nullifidian(noun, adjective)
4
skeptic(noun, person, irreligion, unbelieving, unbeliever)
4
atheistic(adjective, unbelieving)
4
dubious
4
profane(adjective, immoral, crude, disrespectful)
4
sceptic(noun, adjective)
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APASmart Define. (2015). infidel thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/infidel/thesaurus/synonyms
ChicagoSmart Define. 2015. "infidel thesaurus" https://smartdefine.org/infidel/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, infidel thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/infidel/thesaurus/synonyms>.
MLASmart Define. "infidel thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/infidel/thesaurus/synonyms>