13
atheist(noun, person, view, disbelieve, cynic)
11
doubter(noun, person, detractor, cynic, unbelieving)
10
unbeliever(noun, detractor, cynic, unbelieving, pessimist)
9
agnostic(noun, cynic, unbelieving, dissenter, doubter)
7
infidel(noun, unbeliever)
6
nonbeliever(noun, unbeliever)
5
critic(noun, sceptic)
5
cynic(noun, unbeliever, nonbeliever)
5
heathen(noun, unbeliever)
5
questioner(noun, sceptic)
5
skeptic(noun, person, detractor, cynic, unbelieving)
3
freethinker
3
pagan
2
distruster
2
doubting Thomas(noun, skeptic)
2
heretic(noun, unbeliever)
2
nullifidian
2
sceptic
1
denier
1
discrediter
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APASmart Define. (2015). disbeliever thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/disbeliever/thesaurus/synonyms
ChicagoSmart Define. 2015. "disbeliever thesaurus" https://smartdefine.org/disbeliever/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, disbeliever thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/disbeliever/thesaurus/synonyms>.
MLASmart Define. "disbeliever thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/disbeliever/thesaurus/synonyms>