| heaviness(noun, dullness, apathy, inactivity, lethargy) | |
| heedlessness(noun, disregard, interest, lack, dullness) | |
| hoboism | |
| hypnosis(lethargy, daze, slumber, coma, torpor) | |
| hyposthenia(noun, weak, sick, unhealthy) | |
| immovability | |
| immovableness | |
| immunity(noun, disregard, interest, lack, apathy) | |
| impartiality(noun, disregard, interest, lack, apathy) | |
| impassibility | |
| impassibleness | |
| impassiveness(noun, disregard, interest, lack, apathy) | |
| impotence(noun, weak, sick, unhealthy) | |
| impuissance(noun, weak, sick, unhealthy) | |
| inattention(noun, disregard, interest, lack, apathy) | |
| inconsequence(noun, disregard, indifference, detachment, unimportance) | |
| inconsequentiality(noun, disregard, indifference, detachment, unimportance) | |
| inertias | |
| inertion | |
| inexertion |
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| APA | Smart Define. (2016). inertia thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/inertia/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "inertia thesaurus" https://smartdefine.org/inertia/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2016, inertia thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/inertia/thesaurus/synonyms>. |
| MLA | Smart Define. "inertia thesaurus" 1 April 2016. Web. 27 September 2026. <https://smartdefine.org/inertia/thesaurus/synonyms> |