161 entries under tough topic. ×

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ironfisted(rigid, scrupulous)
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painful(adjective, harsh, cruel, grim)
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picky(adjective, severe, firm, harsh)
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prudish(adjective, severe, firm, harsh)
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punctilious(adjective, severe, firm, harsh)
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puritanical(adjective, severe, firm, harsh)
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rancorous(adjective, harsh, cruel, grim)
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resentful(adjective, harsh, cruel, grim)
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rugged(adjective, strong, hard, severe)
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scrupulous(adjective, severe, firm, harsh)
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steel(adjective, strong, hard, sturdy)
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straight(adjective, severe, firm, harsh)
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strait-laced(adjective, severe, firm, harsh)
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strong(adjective, hard, sturdy, rugged)
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stuffy(adjective, severe, firm, harsh)
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sturdy(adjective, strong, hard, rugged)
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thick(adjective, strong, hard, sturdy)
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tough inflexible(expression, strong, hard, sturdy)
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unjust(adjective, harsh, cruel, grim)
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unpermissive(adjective, severe, firm, harsh)
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APASmart Define. (2016). hard-boiled thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/hard-boiled/thesaurus/synonyms
ChicagoSmart Define. 2016. "hard-boiled thesaurus" https://smartdefine.org/hard-boiled/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2016, hard-boiled thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/hard-boiled/thesaurus/synonyms>.
MLASmart Define. "hard-boiled thesaurus" 23 March 2016. Web. 30 September 2026. <https://smartdefine.org/hard-boiled/thesaurus/synonyms>