80 entries under difficult topic. ×

14
problematic(adjective, clear, open, certain)
7
knotty(adjective, hard, delicate, loose)
5
intricate(adjective, hard, delicate, loose)
4
perplexing(adjective, hard, delicate, loose)
4
tricky(adjective, hard, uncertain, complex)
3
awkward(adjective, complex, demanding, tricky)
3
involved(adjective, hard, delicate, loose)
3
puzzling(adjective, hard, loose, complex)
2
challenging(adjective, awkward, demanding, tricky)
2
complex(adjective, hard, delicate, loose)
2
convoluted(adjective, complex, intricate, thorny)
2
grueling(adjective, awkward, demanding)
2
hard(adjective, complex, awkward, demanding)
2
labyrinthine(adjective, hard, delicate, loose)
2
rugged(adjective, complex, awkward, demanding)
2
thorny(adjective, hard, delicate, complex)
2
troublesome(adjective, hard, delicate, loose)
1
Gordian(adjective, complex, awkward, tricky)
1
abstruse(adjective, hard, delicate, loose)
1
byzantine(adjective, complex, intricate, thorny)
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APASmart Define. (2015). problematical thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/problematical/thesaurus/synonyms
ChicagoSmart Define. 2015. "problematical thesaurus" https://smartdefine.org/problematical/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, problematical thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/problematical/thesaurus/synonyms>.
MLASmart Define. "problematical thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/problematical/thesaurus/synonyms>