15 entries under severe topic. ×

10
grueling(adjective, hard, tough, difficult)
7
effortful(adjective, hard, rough, difficult)
4
exhausting(adjective, hard, rough, difficult)
4
labored(adjective, hard, tough, rough)
3
tiring(adjective, hard, rough, difficult)
3
uphill(adjective, hard, tough, rough)
2
crushing(adjective, difficult, harsh, heavy)
2
formidable(adjective, hard, tough, rough)
2
irksome(adjective, hard, tough, rough)
2
rigorous(adjective, hard, tough, rough)
1
distressing(adjective, tough, rough, difficult)
1
exigent(adjective, difficult, harsh, heavy)
1
fatiguing(adjective, hard, rough, difficult)
1
hairy(adjective, hard, rough, difficult)
1
merciless(adjective, tough, rough, difficult)
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APASmart Define. (2015). backbreaking thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/backbreaking/thesaurus/synonyms
ChicagoSmart Define. 2015. "backbreaking thesaurus" https://smartdefine.org/backbreaking/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, backbreaking thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/backbreaking/thesaurus/synonyms>.
MLASmart Define. "backbreaking thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/backbreaking/thesaurus/synonyms>