108 entries under tough topic. ×

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resentful(adjective, severe, harsh, cruel)
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robust(adjective, strong, hard, sturdy)
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steel(adjective, strong, hard, sturdy)
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sturdy(adjective, strong, hard, rugged)
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thick(adjective, strong, hard, sturdy)
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tough inflexible(expression, strong, hard, sturdy)
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unjust(adjective, severe, harsh, cruel)
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vengeful(adjective, harsh, cruel, grim)
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APASmart Define. (2015). strict thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/strict/thesaurus/synonyms
ChicagoSmart Define. 2015. "strict thesaurus" https://smartdefine.org/strict/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, strict thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/strict/thesaurus/synonyms>.
MLASmart Define. "strict thesaurus" 3 August 2015. Web. 28 September 2026. <https://smartdefine.org/strict/thesaurus/synonyms>