200 entries under adjective topic. ×

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ceaseless(persistent, constant)
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cold(mean, harsh, cruel, vicious)
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coldblooded(unyielding, unforgiving, homicidal)
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compassionless(unsparing, inhumane)
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compelling(stiff, strict, demanding)
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confining(stiff, strict, demanding, binding)
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constant
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continual(persistent, constant)
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continuous(persistent, constant)
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convincing(stiff, strict, demanding)
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dead set(expression, tough, rigid, scrupulous)
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dead set on(expression, idiom, stiff, strict)
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demanding(stiff, strict)
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diabolic
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diabolical
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disciplinary(tough, rigid, scrupulous)
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disciplined
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dog eat dog(expression, idiom, malevolent, sadistic)
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dour(tough, rigid, scrupulous)
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draconian(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>