- Definitions|2
- Thesaurus|116
- Abbreviations|0
| cynic(noun, radical, revolutionary, critic, detractor) | |
| atheist(noun, adjective, person, view, disbelieve) | |
| doubter | |
| unbeliever(noun, radical, revolutionary, critic, detractor) | |
| agnostic(noun, adjective) | |
| dissenter(noun, radical, revolutionary, detractor, subversive) | |
| heathen(noun, adjective) | |
| questioner(noun, radical, revolutionary, critic, detractor) | |
| denier | |
| doubting Thomas | |
| skeptic | |
| disbeliever(noun, doubter) | |
| heretical | |
| infidel(noun, adjective) | |
| nullifidian(noun, adjective) | |
| pagan(noun, adjective) | |
| heretic(noun, adjective, radical, revolutionary, detractor) | |
| naysayer | |
| apostate | |
| apostatical |
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| APA | Smart Define. (2016). sceptic thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/sceptic/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "sceptic thesaurus" https://smartdefine.org/sceptic/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2016, sceptic thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/sceptic/thesaurus/synonyms>. |
| MLA | Smart Define. "sceptic thesaurus" 20 February 2016. Web. 20 September 2026. <https://smartdefine.org/sceptic/thesaurus/synonyms> |