| awkwardness | |
| distance(noun, coldness, aloofness, depth, width) | |
| grimness(noun, firmness, severity, strictness, rigidity) | |
| obduracy(noun, severity, harshness, conformity, strictness) | |
| strength(noun, drive, roughness, tenacity, strengthener) | |
| tautness(noun, firmness, tension, rigidity, tightness) | |
| tightness(noun, tension, density, impermeability, tightness) | |
| callousness(noun, roughness, hardness, unevenness, thickness) | |
| clumsiness | |
| immovability(noun, firmness, rigidity, inelasticity) | |
| obstinacy(noun, tenacity) | |
| primness(noun, reserve, propriety) | |
| rigidness | |
| severeness | |
| slowness | |
| sternness(noun, firmness, severity, harshness, conformity) | |
| tenacity(noun, severity, harshness, conformity, strictness) | |
| vitality(drive, stability, strengthener) | |
| woodenness(noun, stuffiness) | |
| acerbity(firmness, severity, strictness, rigidity, inflexibility) |
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| APA | Smart Define. (2015). stiffness thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/stiffness/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "stiffness thesaurus" https://smartdefine.org/stiffness/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, stiffness thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/stiffness/thesaurus/synonyms>. |
| MLA | Smart Define. "stiffness thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/stiffness/thesaurus/synonyms> |