22
infidel(noun, adjective, religion, person, view)
22
disbeliever(noun, religion, person, view, think)
18
pagan(noun, adjective, religion, feature, person)
17
heathen(noun, adjective, religion, person, view)
16
unbeliever(noun, adjective, religion, feature, person)
15
freethinker(noun, religion, person, view, think)
13
agnostic(noun, adjective, religion, person, view)
13
nullifidian(noun, adjective, person, think, thinking)
13
godless(adjective, feature, thinking, atheistic)
12
sceptic(noun, adjective, religion, person, view)
11
irreligionist(noun, religion, person, thinking, disbelief)
11
skeptic(noun, religion, person, disbelief, irreligion)
9
nonbeliever(noun, adjective, religion, feature, person)
8
doubter(noun, adjective, religion, person, view)
8
free thinker(noun, expression, religion, person, thinking)
8
irreligious(adjective, feature, thinking, atheistic)
6
ungodly(adjective, feature, thinking, atheistic)
6
anti-religious(adjective, which, disbelieve, skeptic)
6
freethinking(noun, adjective, person, thinking, unbeliever)
6
nothingarian(noun, person, think, thinking, skeptic)
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APASmart Define. (2016). atheist thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/atheist/thesaurus/synonyms
ChicagoSmart Define. 2016. "atheist thesaurus" https://smartdefine.org/atheist/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, atheist thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/atheist/thesaurus/synonyms>.
MLASmart Define. "atheist thesaurus" 18 February 2016. Web. 20 September 2026. <https://smartdefine.org/atheist/thesaurus/synonyms>