103 entries under toughness topic. ×
| tedium | |
| tribulation(difficulty, severity, harshness, conformity) | |
| trouble |
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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> |