197 entries under hard topic. ×

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grueling(adjective, difficult, awkward, demanding)
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hang-tough(adjective, strong, tough, sturdy)
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hard-boiled(adjective, strong, tough, severe)
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hard-core(adjective, strong, tough, sturdy)
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hard-line(adjective, strong, tough, sturdy)
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hard-shell(adjective, strong, tough, severe)
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hardheaded(adjective, strong, tough, sturdy)
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immovable(adjective, strong, tough, sturdy)
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implacable(adjective, strong, tough, harsh)
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inexorable(adjective, strong, tough, harsh)
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mortified(adjective, strong, tough, sturdy)
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mulish(adjective, strong, tough, sturdy)
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steel(adjective, strong, tough, sturdy)
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stiff-necked(adjective, strong, tough, sturdy)
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thick(adjective, strong, tough, rough)
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tough inflexible(expression, strong, tough, sturdy)
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unbending(adjective, strong, tough, harsh)
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APASmart Define. (2015). rugged thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/rugged/thesaurus/synonyms
ChicagoSmart Define. 2015. "rugged thesaurus" https://smartdefine.org/rugged/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, rugged thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/rugged/thesaurus/synonyms>.
MLASmart Define. "rugged thesaurus" 14 April 2015. Web. 26 September 2026. <https://smartdefine.org/rugged/thesaurus/synonyms>