46 entries under hard topic. ×

2
troublesome(adjective, difficult, delicate, loose)
2
unclear(adjective, clear, obscure, delicate)
1
abstract(delicate, complex, tricky, complicated)
1
abstruse(adjective, difficult, delicate, loose)
1
complicated(adjective, difficult, complex, awkward)
1
enigmatical(adjective, obscure, delicate, complex)
1
entangled(adjective, difficult, delicate, loose)
1
formidable(adjective, difficult, delicate, complex)
1
subtle(delicate, complex, tricky, complicated)
1
tangled(adjective, tricky, complicated)
1
unintelligible(adjective, obscure, delicate, ambiguous)
0
deep(delicate, complex, tricky, complicated)
0
delicate(complex, tricky, complicated, troublesome)
0
esoteric(delicate, complex, tricky, complicated)
0
hard to explain(expression, delicate, complex, tricky)
0
hard to solve(expression, delicate, complex, tricky)
0
hidden(tricky, complicated)
0
inexplicable(delicate, complex, tricky, complicated)
0
loose(delicate, complex, tricky, complicated)
0
meandering(tricky, complicated)
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APASmart Define. (2015). problematical thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/problematical/thesaurus/synonyms
ChicagoSmart Define. 2015. "problematical thesaurus" https://smartdefine.org/problematical/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, problematical thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/problematical/thesaurus/synonyms>.
MLASmart Define. "problematical thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/problematical/thesaurus/synonyms>