68 entries under firmness topic. ×
| sense of purpose(expression, idiom, determination, steadfastness) | |
| stamina(strength, determination, courage, endurance) | |
| starch(strength, determination, courage, endurance) | |
| staunchness(determination, steadfastness) | |
| strength of mind(noun, expression, idiom, resolve) | |
| strength of will(noun, expression, idiom, resolve) | |
| surety(noun, resolve, willpower) | |
| toughness(noun, determination, resolution, perseverance) |
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| APA | Smart Define. (2015). spine thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/spine/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "spine thesaurus" https://smartdefine.org/spine/thesaurus/synonyms (accessed September 28, 2026). |
| Harvard | Smart Define 2015, spine thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/spine/thesaurus/synonyms>. |
| MLA | Smart Define. "spine thesaurus" 10 April 2015. Web. 28 September 2026. <https://smartdefine.org/spine/thesaurus/synonyms> |