Synonyms|155Antonyms|44|Broader|1Narrower|0Related|102

44 entries under heavy topic. ×

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merciless(adjective, tough, rough, difficult)
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scabrous(adjective, tough, rough, difficult)
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slavish(adjective, tough, rough, difficult)
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uphill battle(expression, adjective, tough, rough, difficult)
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APASmart Define. (2015). effortful thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/effortful/thesaurus/synonyms
ChicagoSmart Define. 2015. "effortful thesaurus" https://smartdefine.org/effortful/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, effortful thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/effortful/thesaurus/synonyms>.
MLASmart Define. "effortful thesaurus" 10 April 2015. Web. 28 September 2026. <https://smartdefine.org/effortful/thesaurus/synonyms>