63 entries under complicated topic. ×

5
mystical(adjective, hard, evil, obscure, dark)
4
ticklish(hard, tricky)
4
tricky(adjective, hard, difficult, complex, sophisticated)
3
thorny(adjective, hard, difficult, delicate, loose)
3
convoluted(adjective, hard, fancy, obscure, difficult)
3
unclear(adjective, hard, obscure, difficult, loose)
2
delicate(hard, sharp, exact, tricky)
2
entangled(adjective, hard, fancy, obscure, difficult)
2
formidable(hard, intense, heavy, fierce, tricky)
2
hard(adjective, fancy, obscure, difficult, heavy)
2
inexplicable(adjective, hard, strange, deep, tricky)
2
labyrinthine(adjective, hard, fancy, obscure, difficult)
2
nice(hard, sharp, exact, tricky)
2
tangled(adjective, hard, obscure, difficult, complex)
2
unintelligible(adjective, hard, obscure, difficult, delicate)
1
Daedalean(adjective, hard, fancy, obscure, difficult)
1
Gordian(adjective, hard, fancy, obscure, difficult)
1
bewildering(adjective, hard, obscure, difficult, sophisticated)
1
byzantine(adjective, hard, fancy, obscure, difficult)
1
can of worms(expression, adjective, idiom, hard, fancy)
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APASmart Define. (2015). abstruse thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/abstruse/thesaurus/synonyms
ChicagoSmart Define. 2015. "abstruse thesaurus" https://smartdefine.org/abstruse/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, abstruse thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/abstruse/thesaurus/synonyms>.
MLASmart Define. "abstruse thesaurus" 10 April 2015. Web. 25 September 2026. <https://smartdefine.org/abstruse/thesaurus/synonyms>