5 entries under laborious topic. ×

6
strenuous(adjective, hard, difficult, demanding, exhausting)
5
demanding(adjective, hard, difficult, strenuous, exhausting)
5
exhausting(adjective, hard, difficult, demanding, strenuous)
4
fatiguing(adjective, hard, difficult, demanding, exhausting)
2
uphill(adjective, difficult)
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APASmart Define. (2015). punishing thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/punishing/thesaurus/synonyms
ChicagoSmart Define. 2015. "punishing thesaurus" https://smartdefine.org/punishing/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, punishing thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/punishing/thesaurus/synonyms>.
MLASmart Define. "punishing thesaurus" 10 April 2015. Web. 28 September 2026. <https://smartdefine.org/punishing/thesaurus/synonyms>