- Definitions|2
- Thesaurus|554
- Abbreviations|0
| ideological | |
| idolatrous | |
| impiety(noun, doubt, atheism, unbelief, nihilism) | |
| impious | |
| incredulity(noun, atheism, unbelief, nonbelief) | |
| indifferent | |
| infidel | |
| interested(moderate, open-minded, noninterventionist) | |
| irreligion(noun, doubt, atheism, unbelief, nihilism) | |
| irreverence(noun, doubt, atheism, unbelief, nihilism) | |
| ism | |
| lacking | |
| lacking faith(expression, idiom, irreligion) | |
| laissez-faire(moderate, open-minded, noninterventionist) | |
| left(moderate, open-minded, noninterventionist) | |
| lenient(moderate, open-minded, noninterventionist) | |
| liberated | |
| loose(moderate, open-minded, noninterventionist) | |
| magnanimous(moderate, open-minded, noninterventionist) | |
| middling |
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| APA | Smart Define. (2015). freethinking thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/freethinking/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "freethinking thesaurus" https://smartdefine.org/freethinking/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2015, freethinking thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/freethinking/thesaurus/synonyms>. |
| MLA | Smart Define. "freethinking thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/freethinking/thesaurus/synonyms> |