136 entries under tough topic. ×

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robust(adjective, strong, hard, sturdy)
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set(severe, firm, harsh, stern)
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square(severe, firm, harsh, stern)
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steel(adjective, strong, hard, sturdy)
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stickling(severe, firm, harsh, stern)
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strong(adjective, hard, severe, sharp)
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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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troublesome(adjective, rough, difficult, heavy)
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unjust(adjective, severe, harsh, grim)
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unpermissive(severe, firm, harsh, stern)
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uphill(adjective, rough, difficult, heavy)
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uptight(severe, firm, harsh, stern)
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vengeful(adjective, severe, harsh, cruel)
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wearisome(adjective, rough, difficult, heavy)
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APASmart Define. (2016). unsparing thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/unsparing/thesaurus/synonyms
ChicagoSmart Define. 2016. "unsparing thesaurus" https://smartdefine.org/unsparing/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2016, unsparing thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/unsparing/thesaurus/synonyms>.
MLASmart Define. "unsparing thesaurus" 24 March 2016. Web. 30 September 2026. <https://smartdefine.org/unsparing/thesaurus/synonyms>