72 entries under tough topic. ×

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argumentative(problematic, trying)
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backbreaker(problematic, trying)
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bearish(problematic, trying)
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boorish(problematic, trying)
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challenging(adjective, difficult, awkward, grim)
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crucial(problematic, trying)
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difficile(adjective, difficult, awkward, grim)
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easier said than done(expression, idiom, problematic, trying)
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fastidious(problematic, trying)
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finicky(problematic, trying)
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fractious(problematic, trying)
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fussy(problematic, trying)
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galling(severe, harsh, heavy, painful)
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hard-won(problematic, trying)
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hard to please(expression, idiom, problematic, trying)
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herculean(adjective, difficult, awkward, grim)
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immense(problematic, trying)
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impolite(problematic, trying)
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intractable(problematic, trying)
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irritable(problematic, trying)
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APASmart Define. (2015). grueling thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/grueling/thesaurus/synonyms
ChicagoSmart Define. 2015. "grueling thesaurus" https://smartdefine.org/grueling/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2015, grueling thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/grueling/thesaurus/synonyms>.
MLASmart Define. "grueling thesaurus" 10 April 2015. Web. 30 September 2026. <https://smartdefine.org/grueling/thesaurus/synonyms>