1
distressing(adjective, tough, severe, rough, difficult)
1
effort
1
enceinte
1
exigent(adjective, severe, difficult, harsh, heavy)
1
fatiguing(adjective, hard, severe, rough, difficult)
1
fermented
1
hairy(adjective, hard, severe, rough, difficult)
1
hard-earned
1
hard-fought
1
impenetrable
1
killing
1
knockout
1
labourious
1
lowering
1
mean(adjective, hard, rough, difficult, cruel)
1
merciless(adjective, tough, severe, rough, difficult)
1
murder(adjective, hard, tough, rough, difficult)
1
plaguey
1
scabrous(adjective, tough, rough, difficult, heavy)
1
slavish(adjective, tough, rough, difficult, heavy)
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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>