8
skeptic(noun, person, unbelieving)
4
atheist(noun, adversary)
3
agnostic(noun, adversary)
2
doubter(noun, person)
2
denier
1
cynic(noun, nonbeliever)
1
heretic
1
pagan(noun, person)
1
priest
1
questioner
1
rejector
1
sceptic
0
nonbeliever(noun, unbeliever)
0
authority
0
disbeliever(noun, verb, adversary)
0
mentor
0
adversary
0
adviser
0
combatant
0
commander
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APASmart Define. (2015). believer thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/believer/thesaurus/antonyms
ChicagoSmart Define. 2015. "believer thesaurus" https://smartdefine.org/believer/thesaurus/antonyms (accessed September 23, 2026).
HarvardSmart Define 2015, believer thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/believer/thesaurus/antonyms>.
MLASmart Define. "believer thesaurus" 24 December 2015. Web. 23 September 2026. <https://smartdefine.org/believer/thesaurus/antonyms>