50 entries under rigidity topic. ×
| hardheartedness(firmness, inflexibility) | |
| impenetrability(noun, protection, security, hardness) | |
| impermeability(noun, protection, security, hardness) | |
| imperviousness(noun, protection, security, hardness) | |
| maturity | |
| permanence | |
| resoluteness | |
| sharpness(firmness, inflexibility) | |
| tensile strength(noun, expression, protection, security) | |
| unkindness(firmness, inflexibility) |
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| APA | Smart Define. (2015). stiffness thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/stiffness/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "stiffness thesaurus" https://smartdefine.org/stiffness/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, stiffness thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/stiffness/thesaurus/synonyms>. |
| MLA | Smart Define. "stiffness thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/stiffness/thesaurus/synonyms> |