114 entries under hard topic. ×

19
backbreaking(adjective, difficult, complex, awkward)
19
composite(adjective, difficult, complex)
19
compound(adjective, difficult, complex)
19
esoteric(adjective, evil, difficult, complex)
19
hard to understand(expression, adjective, idiom, difficult)
19
lumpish(adjective, difficult, complex, density)
19
massive(adjective, difficult, complex, density)
19
perplexed(adjective, difficult, complex)
19
serious(adjective, difficult, complex, awkward)
19
toilful(adjective, difficult, complex, awkward)
18
messy(adjective, difficult, complex)
18
precarious(adjective, difficult, complex)
18
stubborn(adjective, difficulty, difficult, complex)
17
tangled(adjective, simple, obscure, difficulty)
13
baffling(adjective, tough, difficult, awkward)
13
convoluted(adjective, simple, fancy, obscure)
12
perplexing(adjective, fancy, obscure, difficult)
10
puzzling(adjective, fancy, evil, obscure)
9
ticklish(adjective, tough, difficult, delicate)
8
problematical(adjective, difficult, delicate, loose)
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APASmart Define. (2015). knotty thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/knotty/thesaurus/synonyms
ChicagoSmart Define. 2015. "knotty thesaurus" https://smartdefine.org/knotty/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, knotty thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/knotty/thesaurus/synonyms>.
MLASmart Define. "knotty thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/knotty/thesaurus/synonyms>