58 entries under thorny topic. ×

8
troublesome(adjective, hard, fancy, difficult, complex)
7
formidable(adjective, hard, severe, rough, difficult)
6
abstruse(adjective, hard, fancy, evil, obscure)
5
enigmatic(adjective, hard, evil, obscure, difficult)
5
mystifying(adjective, hard, evil, delicate, loose)
5
prickly(spiky, spiny)
4
entangled(adjective, hard, fancy, obscure, difficult)
4
obscure(adjective, hard, difficult, complex, sophisticated)
4
recondite(adjective, hard, fancy, evil, obscure)
3
dense(adjective, difficult, complex, involved, complicated)
2
Daedalean(adjective, hard, fancy, obscure, difficult)
2
bothersome(adjective, tough, rough, difficult, heavy)
2
deep(adjective, hard, evil, delicate, loose)
2
fancy(adjective, hard, difficult, exact, complex)
2
mysterious(adjective, hard, evil, delicate, loose)
2
nettlesome(tough, tricky, complicated, problematic)
2
spiny(tricky, complicated, spiky)
1
brambly(adjective, harsh, coarse, irregular, uneven)
1
bristly(adjective, harsh, coarse, irregular, uneven)
1
can of worms(expression, adjective, idiom, hard, fancy)
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APASmart Define. (2015). knotty thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/knotty/thesaurus/synonyms
ChicagoSmart Define. 2015. "knotty thesaurus" https://smartdefine.org/knotty/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, knotty thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/knotty/thesaurus/synonyms>.
MLASmart Define. "knotty thesaurus" 14 April 2015. Web. 29 September 2026. <https://smartdefine.org/knotty/thesaurus/synonyms>