54 entries under problematical topic. ×

4
operose(adjective, tough, severe, rough, difficult)
4
rigorous(adjective, hard, tough, severe, rough)
4
tricky(adjective, tough, difficult, complex, awkward)
4
wearying(adjective, tough, rough, difficult, heavy)
3
exacting(adjective, tough, severe, rough, difficult)
3
grinding(adjective, tough, rough, difficult, heavy)
3
heavy(adjective, tough, severe, rough, difficult)
3
tiring(adjective, hard, tough, rough, difficult)
2
Herculean(adjective, tough, severe, difficult, awkward)
2
backbreaking(adjective, hard, tough, severe, rough)
2
bothersome(adjective, tough, severe, difficult, awkward)
2
complicated(adjective, tough, rough, difficult, heavy)
2
difficile(adjective, tough, severe, rough, difficult)
2
fatiguing(adjective, hard, tough, rough, difficult)
2
hairy(adjective, hard, tough, severe, rough)
2
intricate(adjective, tough, severe, difficult, awkward)
2
mean(adjective, hard, severe, rough, difficult)
2
serious(adjective, tough, easy, rough, difficult)
2
wearing(adjective, tough, rough, difficult, heavy)
1
challenging(adjective, great, tough, severe, difficult)
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APASmart Define. (2015). uphill thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/uphill/thesaurus/synonyms
ChicagoSmart Define. 2015. "uphill thesaurus" https://smartdefine.org/uphill/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, uphill thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/uphill/thesaurus/synonyms>.
MLASmart Define. "uphill thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/uphill/thesaurus/synonyms>