54 entries under problematical topic. ×

4
labored(adjective, hard, tough, difficult, awkward)
3
uphill(adjective, hard, tough, difficult, awkward)
2
demanding(adjective, hard, tough, severe, difficult)
2
exacting(adjective, tough, severe, difficult, harsh)
2
grinding(adjective, severe, difficult, harsh, heavy)
2
hairy(adjective, difficult, awkward, demanding, exhausting)
2
rough(adjective, hard, tough, difficult, awkward)
1
wearisome(adjective, hard, tough, difficult, awkward)
1
wearying(adjective, difficult, awkward, demanding, trying)
1
distressing(adjective, severe, difficult, harsh, heavy)
1
formidable(adjective, hard, tough, severe, difficult)
1
rigorous(adjective, hard, tough, severe, difficult)
1
serious(adjective, severe, difficult, harsh, heavy)
1
slavish(adjective, difficult, awkward, demanding)
1
sticky(adjective, difficult, awkward, demanding)
1
terrible(adjective, severe, difficult, awkward, demanding)
1
testing(adjective, tough, difficult, awkward, grim)
1
toilful(adjective, difficult, awkward, demanding)
1
tricky(adjective, difficult, awkward, demanding)
1
unsparing(adjective, difficult, awkward, demanding)
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APASmart Define. (2015). grueling thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/grueling/thesaurus/synonyms
ChicagoSmart Define. 2015. "grueling thesaurus" https://smartdefine.org/grueling/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, grueling thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/grueling/thesaurus/synonyms>.
MLASmart Define. "grueling thesaurus" 10 April 2015. Web. 25 September 2026. <https://smartdefine.org/grueling/thesaurus/synonyms>