55 entries under thorny topic. ×

8
perplexing(adjective, hard, fancy, obscure, difficult)
6
puzzling(adjective, hard, fancy, obscure, difficult)
5
recondite(adjective, hard, fancy, obscure, difficult)
4
mixed(adjective, hard, fancy, obscure, difficult)
3
fancy(adjective, hard, difficult, complex, sophisticated)
2
problematical(adjective, hard, difficult, delicate, loose)
2
troublesome(adjective, hard, fancy, difficult, complex)
1
Daedalean(adjective, hard, fancy, obscure, difficult)
1
bothersome(adjective, tough, rough, difficult, heavy)
1
can of worms(expression, adjective, idiom, hard, fancy)
1
formidable(adjective, hard, rough, difficult, complex)
1
gasser(adjective, hard, fancy, difficult, complex)
1
hi-tech(adjective, hard, fancy, difficult, complex)
1
interlaced(adjective, hard, fancy, difficult, complex)
1
mega factor(expression, adjective, hard, fancy, difficult)
1
nettlesome(tricky, complicated, spiky, spiny)
1
nice(adjective, hard, delicate, loose, complex)
1
prickly(spiky, spiny)
1
stimulating(adjective, bright, energetic, active, vigorous)
1
unclear(adjective, hard, delicate, loose, complex)
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APASmart Define. (2015). involved thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/involved/thesaurus/synonyms
ChicagoSmart Define. 2015. "involved thesaurus" https://smartdefine.org/involved/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2015, involved thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/involved/thesaurus/synonyms>.
MLASmart Define. "involved thesaurus" 14 April 2015. Web. 30 September 2026. <https://smartdefine.org/involved/thesaurus/synonyms>