11
atheist(noun, person, view, radical, disbelieve)
10
free spirit(noun, expression, nonconformist)
6
skeptic(noun, person, radical, nonconformist, irreligion)
6
independent(noun, nonconformist, individualist, maverick)
6
maverick(noun, independent, nonconformist, individualist, independent thinker)
5
infidel(noun, radical, irreligion)
5
agnostic(noun, radical, irreligion)
5
radical(noun, person, independent thinker)
5
libertine(noun, radical)
5
nonconformist(noun, rebel, independent, fanatic, progressive)
4
eclectic
4
individualist(noun, independent thinker)
4
latitudinarian(noun, adjective, irreligion)
3
heretic(noun, independent thinker)
3
deist(noun, irreligion)
3
liberal
3
pagan(noun, person)
2
unbeliever(noun, nonconformist, irreligion, separatist, cynic)
2
heathen(noun, irreligion)
2
non-believer(noun, independent thinker)
11 years ago|2.4k views|share |citing 
APASmart Define. (2015). freethinker thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/freethinker/thesaurus/synonyms
ChicagoSmart Define. 2015. "freethinker thesaurus" https://smartdefine.org/freethinker/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, freethinker thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/freethinker/thesaurus/synonyms>.
MLASmart Define. "freethinker thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/freethinker/thesaurus/synonyms>