86 entries under hard topic. ×

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rugged(adjective, strong, tough, sturdy)
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steel(adjective, strong, tough, sturdy)
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strong(adjective, tough, cold, sturdy)
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sturdy(adjective, strong, tough, rugged)
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thick(adjective, strong, tough, sturdy)
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tough inflexible(expression, strong, tough, sturdy)
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APASmart Define. (2015). hardheaded thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/hardheaded/thesaurus/synonyms
ChicagoSmart Define. 2015. "hardheaded thesaurus" https://smartdefine.org/hardheaded/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, hardheaded thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/hardheaded/thesaurus/synonyms>.
MLASmart Define. "hardheaded thesaurus" 13 April 2015. Web. 26 September 2026. <https://smartdefine.org/hardheaded/thesaurus/synonyms>