26 entries under strenuous topic. ×

2
irksome(adjective, hard, tough, severe, rough)
2
troublesome(adjective, hard, rough, difficult, harsh)
1
hairy(adjective, hard, severe, rough, difficult)
1
mean(adjective, hard, rough, difficult, cruel)
0
challenging(adjective, difficult, awkward, demanding)
0
testing(adjective, difficult, awkward, demanding)
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APASmart Define. (2015). backbreaking thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/backbreaking/thesaurus/synonyms
ChicagoSmart Define. 2015. "backbreaking thesaurus" https://smartdefine.org/backbreaking/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, backbreaking thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/backbreaking/thesaurus/synonyms>.
MLASmart Define. "backbreaking thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/backbreaking/thesaurus/synonyms>