47 entries under hard topic. ×

34
puzzling(adjective, knowledge, evil, obscure)
21
dark(adjective, mysterious, obscure, secret, hidden)
20
perplexing(adjective, obscure, rough, difficult)
20
mysterious(adjective, knowledge, evil, obscure)
18
baffling(adjective, obscure, difficult, solid)
18
obscure(adjective, cover, sharp, rough)
15
mystifying(adjective, knowledge, evil, obscure)
12
confusing(adjective, uncertain, vague, unclear)
11
abstruse(noun, adjective, evil, sharp)
11
esoteric(adjective, evil, sharp, obscure)
11
unclear(adjective, obscure, rough, difficult)
11
unfathomable(adjective, obscure, difficult, solid)
10
enigmatical(adjective, obscure, solid, uncertain)
8
inexplicable(adjective, obscure, rough, solid)
8
intricate(adjective, evil, obscure, difficult)
8
opaque(adjective, obscure, uncertain, vague)
7
bewildering(adjective, obscure, sophisticated, unclear)
7
confounding(adjective, tricky, complicated)
7
profound(adjective, obscure, deep, tricky)
6
complex(adjective, obscure, difficult, tricky)
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APASmart Define. (2016). enigmatic thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/enigmatic/thesaurus/synonyms
ChicagoSmart Define. 2016. "enigmatic thesaurus" https://smartdefine.org/enigmatic/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, enigmatic thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/enigmatic/thesaurus/synonyms>.
MLASmart Define. "enigmatic thesaurus" 29 March 2016. Web. 24 September 2026. <https://smartdefine.org/enigmatic/thesaurus/synonyms>