45 entries under difficult topic. ×

31
perplexing(adjective, hard, fancy, obscure, rough)
28
enigmatic(adjective, hard, knowledge, evil, obscure)
24
baffling(adjective, strange, mysterious, complicated)
24
mystifying(adjective, hard, knowledge, evil, obscure)
17
abstruse(adjective, hard, fancy, evil, obscure)
15
cryptic(adjective, knowledge, evil, obscure)
11
intricate(adjective, hard, fancy, evil, obscure)
10
complex(adjective, hard, fancy, heavy)
9
knotty(adjective, hard, fancy, evil, obscure)
8
complicated(adjective, hard, evil, obscure)
8
hard(adjective, fancy, severe, complex)
8
recondite(adjective, hard, fancy, evil, obscure)
6
involved(adjective, hard, fancy, obscure)
6
problematic(adjective, hard, open, fancy, rough)
4
abstract(hard, obscure, vague, tricky)
4
convoluted(adjective, hard, fancy, obscure)
4
tough(adjective, laborious)
3
heavy
3
problematical(adjective, hard, loose, complex)
3
thorny(adjective, hard, loose, complex)
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APASmart Define. (2015). puzzling thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/puzzling/thesaurus/synonyms
ChicagoSmart Define. 2015. "puzzling thesaurus" https://smartdefine.org/puzzling/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, puzzling thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/puzzling/thesaurus/synonyms>.
MLASmart Define. "puzzling thesaurus" 13 April 2015. Web. 21 September 2026. <https://smartdefine.org/puzzling/thesaurus/synonyms>