| impersonal(adjective, tough, rational, straightforward, sober) | |
| in a stupor(expression, idiom) | |
| indolent | |
| indulgent | |
| indurated(adjective, cool, blank, aloof, unemotional) | |
| inexpressive(adjective, cool, blank, aloof, unemotional) | |
| inirritable | |
| insouciant | |
| insusceptible(adjective, cool, blank, aloof, unemotional) | |
| isolated | |
| lenient | |
| lenten(adjective, ascetic) | |
| level-headed(adjective, unexcitable) | |
| lifeless(adjective, calm, tough, rational, straightforward) | |
| longanimous | |
| man of iron(expression, idiom) | |
| marble(adjective, impassive, laid-back, dispassionate, emotionless) | |
| metaphysical(moral, logical) | |
| metaphysician | |
| moldering |
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| APA | Smart Define. (2015). stoic thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/stoic/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "stoic thesaurus" https://smartdefine.org/stoic/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2015, stoic thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/stoic/thesaurus/synonyms>. |
| MLA | Smart Define. "stoic thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/stoic/thesaurus/synonyms> |