200 entries under noun topic. ×
| permanence(support, control, strength, balance) | |
| harshness(power, abuse, easy, difficulty) | |
| rigidity(easy, condition, discipline, firmness) | |
| severity(power, abuse, easy, difficulty) | |
| callousness(cruelty, insensitivity, coldness, impenitence) | |
| rigor(easy, condition, discipline, firmness) | |
| stiffness(firmness, protection, severity, security) | |
| toughness(support, control, power, strength) | |
| austerity(easy, condition, discipline, firmness) | |
| firmness(support, control, change, strength) | |
| rigorousness(easy, condition, discipline, firmness) | |
| rigour | |
| solidity(support, control, strength, balance) | |
| difficulty(difficulty, discipline, severity, harshness) | |
| inclemency(severity, harshness, conformity, strictness) | |
| strength(support, control, change, continue) | |
| unfeelingness | |
| callosity | |
| roughness(power, difficulty, violence, severity) | |
| arduousness(difficulty, discipline, toughness, strictness) |
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| APA | Smart Define. (2015). hardness thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/hardness/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "hardness thesaurus" https://smartdefine.org/hardness/thesaurus/synonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2015, hardness thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/hardness/thesaurus/synonyms>. |
| MLA | Smart Define. "hardness thesaurus" 14 April 2015. Web. 26 September 2026. <https://smartdefine.org/hardness/thesaurus/synonyms> |