Synonyms|905Antonyms|165|Broader|8Narrower|0Related|298

178 entries under tough topic. ×

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distressing(adjective, harsh, cruel, grim)
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ferric(adjective, strong, hard, sturdy)
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ferrous(adjective, strong, hard, sturdy)
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frowning(adjective, strong, hard, sturdy)
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grievous(adjective, harsh, cruel, grim)
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hardboiled(adjective, stiff, unfeeling, dogged)
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intemperate(adjective, harsh, cruel, grim)
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intolerable(adjective, harsh, cruel, grim)
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mortified(adjective, strong, hard, sturdy)
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painful(adjective, harsh, cruel, grim)
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resentful(adjective, harsh, cruel, grim)
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robust(adjective, strong, hard, sturdy)
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rock hard(expression, adjective, strong, hard)
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steel(adjective, strong, hard, sturdy)
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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, harsh, cruel, grim)
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vengeful(adjective, harsh, cruel, grim)
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ChicagoSmart Define. 2016. "obdurate thesaurus" https://smartdefine.org/obdurate/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2016, obdurate thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/obdurate/thesaurus/synonyms>.
MLASmart Define. "obdurate thesaurus" 23 March 2016. Web. 29 September 2026. <https://smartdefine.org/obdurate/thesaurus/synonyms>