103 entries under toughness topic. ×
| immobility(noun, support, control, strength, balance) | |
| immovability(noun, support, control, strength, balance) | |
| impasse | |
| knot | |
| labor | |
| maturity(noun, support, control, strength, balance) | |
| resoluteness(noun, support, control, strength, balance) | |
| sharpness(noun, discipline, firmness, severity, harshness) | |
| strait(noun, difficulty) | |
| unkindness(noun, discipline, firmness, severity, harshness) | |
| barricade | |
| check | |
| crisis | |
| crux | |
| dead end(expression, difficulty) | |
| deadlock | |
| deep water(expression, difficulty) | |
| dilemma | |
| emergency | |
| fix |
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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> |