61 entries under hard topic. ×

31
perplexing(adjective, fancy, obscure, rough)
28
enigmatic(adjective, knowledge, evil, obscure)
27
mysterious(adjective, knowledge, evil, obscure)
24
mystifying(adjective, knowledge, evil, obscure)
19
confusing(adjective, false, uncertain, awkward)
17
abstruse(adjective, fancy, evil, obscure)
11
bewildering(adjective, obscure, false, awkward)
11
intricate(adjective, fancy, evil, obscure)
10
complex(adjective, fancy, difficult, heavy)
10
confounding(adjective, false, tricky, ambiguous)
10
difficult(adjective, fancy, obscure, strange)
9
enigmatical(adjective, obscure, strange, uncertain)
9
knotty(adjective, fancy, evil, obscure)
8
complicated(adjective, evil, obscure, difficult)
8
dark(adjective, evil, obscure, rough)
8
recondite(adjective, fancy, evil, obscure)
7
inexplicable(adjective, dark, strange, uncertain)
6
involved(adjective, fancy, obscure, difficult)
6
problematic(adjective, open, fancy, rough)
5
paradoxical(adjective, obscure, sophisticated, tricky)
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APASmart Define. (2015). puzzling thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/puzzling/thesaurus/synonyms
ChicagoSmart Define. 2015. "puzzling thesaurus" https://smartdefine.org/puzzling/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, puzzling thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/puzzling/thesaurus/synonyms>.
MLASmart Define. "puzzling thesaurus" 13 April 2015. Web. 22 September 2026. <https://smartdefine.org/puzzling/thesaurus/synonyms>