88 entries under difficult topic. ×

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involved(adjective, tough, rough, heavy)
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problematical(adjective, awkward, demanding, grueling)
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scabrous(adjective, tough, rough, heavy)
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slavish(adjective, tough, rough, heavy)
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toilful(adjective, tough, rough, heavy)
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uphill battle(expression, adjective, tough, rough)
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worrisome
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worrying(heavy, troublesome, onerous)
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APASmart Define. (2016). exacting thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/exacting/thesaurus/synonyms
ChicagoSmart Define. 2016. "exacting thesaurus" https://smartdefine.org/exacting/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, exacting thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/exacting/thesaurus/synonyms>.
MLASmart Define. "exacting thesaurus" 29 March 2016. Web. 23 September 2026. <https://smartdefine.org/exacting/thesaurus/synonyms>