23 entries under difficult topic. ×

20
convoluted(adjective, obscure, complex, sophisticated)
16
labyrinthine(adjective, obscure, complex, sophisticated)
14
involved(adjective, obscure, complex, sophisticated)
13
complicated(adjective, obscure, complex, sophisticated)
12
Byzantine(adjective, obscure, complex, sophisticated)
10
intricate(adjective, obscure, complex, sophisticated)
9
complex(adjective, sophisticated, involved, dense)
9
knotty(adjective, obscure, complex, sophisticated)
8
tangled(adjective, obscure, complex, sophisticated)
7
tricky(adjective, complex, sophisticated, involved)
5
elaborate(adjective, complex, sophisticated, involved)
3
daedal(adjective, complex, sophisticated, involved)
2
rococo(adjective, complex, sophisticated, involved)
1
abstruse(adjective, obscure, complex, sophisticated)
1
entangled(adjective, obscure, complex, sophisticated)
1
obscure(adjective, complex, sophisticated, involved)
1
perplexing(adjective, obscure, complex, sophisticated)
1
sophisticated(adjective, obscure, complex, involved)
0
baroque(adjective, complex, sophisticated, involved)
0
can of worms(expression, adjective, idiom, complex)
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APASmart Define. (2015). tortuous thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/tortuous/thesaurus/synonyms
ChicagoSmart Define. 2015. "tortuous thesaurus" https://smartdefine.org/tortuous/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, tortuous thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/tortuous/thesaurus/synonyms>.
MLASmart Define. "tortuous thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/tortuous/thesaurus/synonyms>