200 entries under adjective topic. ×

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rigid(tough, pitiless, scrupulous, merciless)
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rigorous(tough, rigid, scrupulous)
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rough(stiff, strict, demanding)
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savage(mean, harsh, cruel, vicious)
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scrupulous(tough, rigid)
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set(tough, rigid, prearranged, scrupulous)
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square(tough, rigid, scrupulous)
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steady(persistent, constant)
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stickling(tough, rigid, scrupulous)
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stiff(strict, demanding)
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stiff-necked(persistent, constant, prearranged, dogged)
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straight(tough, rigid, scrupulous)
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strait-laced(tough, rigid, scrupulous)
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strict(stiff, demanding)
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stringent(tough, rigid, scrupulous, disciplined)
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structured
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stuffy(tough, rigid, scrupulous)
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tenacious(persistent, constant)
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tight(close, mean, near, narrow)
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tough(rigid, scrupulous)
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APASmart Define. (2015). ironfisted thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/ironfisted/thesaurus/synonyms
ChicagoSmart Define. 2015. "ironfisted thesaurus" https://smartdefine.org/ironfisted/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, ironfisted thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/ironfisted/thesaurus/synonyms>.
MLASmart Define. "ironfisted thesaurus" 13 April 2015. Web. 27 September 2026. <https://smartdefine.org/ironfisted/thesaurus/synonyms>