54 entries under demanding topic. ×

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scabrous(adjective, difficult, awkward, grueling)
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serious(adjective, difficult, awkward, grueling)
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severe(adjective, difficult, awkward, grueling)
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slavish(adjective, difficult, awkward, grueling)
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strenuous(adjective, difficult, awkward, grueling)
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testing(adjective, difficult, awkward, grueling)
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tiring(adjective, difficult, awkward, grueling)
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toilful(adjective, difficult, awkward, grueling)
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toilsome(adjective, difficult, awkward, grueling)
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unsparing(adjective, difficult, awkward, grueling)
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uphill battle(expression, adjective, difficult, awkward)
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wearing(adjective, difficult, awkward, grueling)
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wearisome(adjective, difficult, awkward, grueling)
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wearying(adjective, difficult, awkward, grueling)
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APASmart Define. (2015). problematical thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/problematical/thesaurus/synonyms
ChicagoSmart Define. 2015. "problematical thesaurus" https://smartdefine.org/problematical/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, problematical thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/problematical/thesaurus/synonyms>.
MLASmart Define. "problematical thesaurus" 14 April 2015. Web. 26 September 2026. <https://smartdefine.org/problematical/thesaurus/synonyms>