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

66 entries under adjective topic. ×

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inflexible(strong, hard, tough, sturdy)
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insensible(strong, hard, tough, sturdy)
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mortified(strong, hard, tough, sturdy)
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mulish(strong, hard, tough, sturdy)
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obdurate(strong, hard, tough, sturdy)
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relentless(strong, hard, tough, sturdy)
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rigid(strong, hard, tough, sturdy)
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rigorous(strong, hard, tough, sturdy)
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robust(strong, hard, tough, sturdy)
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rock hard(expression, strong, hard, tough)
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rough(strong, hard, tough, sturdy)
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rugged(strong, hard, tough, sturdy)
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serious(strong, hard, tough, sturdy)
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severe(strong, hard, tough, sturdy)
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steely(strong, hard, tough, sturdy)
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stiff-necked(strong, hard, tough, sturdy)
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strict(strong, hard, tough, sturdy)
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strong(hard, tough, sturdy, rigid)
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sturdy(strong, hard, tough, rugged)
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thick(strong, hard, tough, sturdy)
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APASmart Define. (2013). ferric thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/ferric/thesaurus/synonyms
ChicagoSmart Define. 2013. "ferric thesaurus" https://smartdefine.org/ferric/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2013, ferric thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/ferric/thesaurus/synonyms>.
MLASmart Define. "ferric thesaurus" 17 June 2013. Web. 26 September 2026. <https://smartdefine.org/ferric/thesaurus/synonyms>