54 entries under problematical topic. ×

7
formidable(adjective, hard, severe, rough, difficult)
6
scabrous(adjective, rough, difficult, harsh, coarse)
5
awkward(adjective, tough, difficulty, difficult, delicate)
5
demanding(adjective, hard, tough, severe, rough)
5
hairy(adjective, severe, rough, difficult, harsh)
5
strenuous(adjective, hard, severe, rough, difficult)
5
uphill(adjective, hard, tough, severe, rough)
4
effortful(adjective, hard, tough, severe, rough)
4
onerous(adjective, hard, tough, severe, rough)
4
terrible(adjective, tough, rough, difficult, heavy)
4
wearying(adjective, tough, rough, difficult, heavy)
3
heavy(adjective, hard, tough, severe, rough)
3
wearing(adjective, tough, rough, difficult, heavy)
2
bothersome(adjective, tough, rough, difficult, heavy)
2
difficile(adjective, tough, rough, difficult, heavy)
2
exacting(adjective, hard, tough, severe, rough)
2
mean(adjective, hard, tough, severe, rough)
2
rigorous(adjective, tough, severe, rough, difficult)
2
slavish(adjective, tough, rough, difficult, heavy)
2
wearisome(adjective, hard, tough, severe, rough)
11 years ago|18k views|share |citing 
APASmart Define. (2015). knotty thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/knotty/thesaurus/synonyms
ChicagoSmart Define. 2015. "knotty thesaurus" https://smartdefine.org/knotty/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, knotty thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/knotty/thesaurus/synonyms>.
MLASmart Define. "knotty thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/knotty/thesaurus/synonyms>