54 entries under problematical topic. ×

7
operose(adjective, hard, tough, severe, rough)
6
backbreaking(adjective, strong, hard, rough, difficult)
6
grueling(adjective, hard, tough, severe, difficult)
6
rough(adjective, action, hard, great, tough)
6
troublesome(adjective, tough, severe, difficult, awkward)
5
Herculean(adjective, strong, tough, severe, difficult)
5
knotty(adjective, hard, severe, rough, difficult)
5
tricky(adjective, difficult, awkward, demanding, irritating)
4
mean(adjective, strong, hard, severe, rough)
4
rigorous(adjective, hard, tough, severe, rough)
4
serious(adjective, hard, severe, rough, difficult)
4
sticky(adjective, tough, rough, difficult, heavy)
4
wearing(adjective, dull, difficult, awkward, boring)
3
complicated(adjective, hard, tough, severe, rough)
3
labored(adjective, hard, great, tough, rough)
2
bothersome(adjective, tough, severe, difficult, awkward)
2
challenging(adjective, great, tough, severe, difficult)
2
grinding(adjective, tough, severe, rough, difficult)
2
hairy(adjective, hard, severe, rough, difficult)
2
intricate(adjective, tough, severe, difficult, awkward)
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APASmart Define. (2016). strenuous thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/strenuous/thesaurus/synonyms
ChicagoSmart Define. 2016. "strenuous thesaurus" https://smartdefine.org/strenuous/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, strenuous thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/strenuous/thesaurus/synonyms>.
MLASmart Define. "strenuous thesaurus" 1 April 2016. Web. 24 September 2026. <https://smartdefine.org/strenuous/thesaurus/synonyms>