Synonyms|72Antonyms|1|Broader|0Narrower|0Related|8

61 entries under tough topic. ×

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obdurate(adjective, strong, hard, sturdy)
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relentless(adjective, strong, hard, sturdy)
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rigid(adjective, strong, hard, sturdy)
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rigorous(adjective, strong, hard, sturdy)
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robust(adjective, strong, hard, sturdy)
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rock hard(expression, adjective, strong, hard)
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rough(adjective, strong, hard, sturdy)
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rugged(adjective, strong, hard, sturdy)
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serious(adjective, strong, hard, sturdy)
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severe(adjective, strong, hard, sturdy)
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steely(adjective, strong, hard, sturdy)
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stiff-necked(adjective, strong, hard, sturdy)
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strict(adjective, strong, hard, sturdy)
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strong(adjective, hard, sturdy, rigid)
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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, adjective, strong, hard)
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unbending(adjective, strong, hard, sturdy)
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unrelenting(adjective, strong, hard, sturdy)
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unsparing(adjective, strong, hard, sturdy)
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ChicagoSmart Define. 2013. "ferric thesaurus" https://smartdefine.org/ferric/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2013, ferric thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/ferric/thesaurus/synonyms>.
MLASmart Define. "ferric thesaurus" 17 June 2013. Web. 29 September 2026. <https://smartdefine.org/ferric/thesaurus/synonyms>