103 entries under toughness topic. ×
| solidness(noun, support, control, strength, balance) | |
| stableness(noun, support, control, change, strength) | |
| steadfastness(noun, support, control, strength, balance) | |
| vigor(noun, strength, durability, solidity) | |
| adherence(noun, support, control, strength, balance) | |
| aplomb(noun, support, control, strength, balance) | |
| assurance(noun, support, control, strength, balance) | |
| backbone(noun, support, control, strength, balance) | |
| balance(noun, support, control, strength, firmness) | |
| constancy(noun, support, control, strength, balance) | |
| dependability(noun, support, control, strength, balance) | |
| distress(noun, difficulty) | |
| endurance(noun, support, control, strength, balance) | |
| establishment(noun, support, control, strength, balance) | |
| exigency(noun, difficulty) | |
| frustration | |
| hazard | |
| hindrance | |
| hitch | |
| hot water(expression, difficulty) |
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| APA | Smart Define. (2015). hardness thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/hardness/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "hardness thesaurus" https://smartdefine.org/hardness/thesaurus/synonyms (accessed September 29, 2026). |
| Harvard | Smart Define 2015, hardness thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/hardness/thesaurus/synonyms>. |
| MLA | Smart Define. "hardness thesaurus" 14 April 2015. Web. 29 September 2026. <https://smartdefine.org/hardness/thesaurus/synonyms> |