107 entries under demanding topic. ×

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crushing(severe, harsh, heavy, painful)
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fierce(tough, strenuous, stressful, exhausting)
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sapping(adjective, tedious, strenuous, fatal)
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solemn(adjective, hard, severe, rough, tedious)
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superincumbent(heavy, troublesome, taxing, onerous)
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uncharitable(adjective, exacting)
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uphill battle(expression, adjective, tough, rough, heavy)
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APASmart Define. (2016). difficult thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/difficult/thesaurus/synonyms
ChicagoSmart Define. 2016. "difficult thesaurus" https://smartdefine.org/difficult/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, difficult thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/difficult/thesaurus/synonyms>.
MLASmart Define. "difficult thesaurus" 24 March 2016. Web. 23 September 2026. <https://smartdefine.org/difficult/thesaurus/synonyms>