75 entries under obscure topic. ×

53
profound(adjective, good, feeling, strong, hard)
19
recondite(adjective, sound, easy, evil)
16
abstruse(adjective, hard, sound, easy, evil)
16
unfathomable(adjective, hard, complete, difficult)
14
esoteric(adjective, hard, sound, easy, evil)
13
secret(adjective, evil, humble, thoughtful)
12
mysterious(adjective, hard, evil, heavy)
12
arcane(adjective, hard, evil, heavy)
11
heavy(adjective, dull, set, strong, tough)
11
involved(adjective, hard, property, complex)
11
occult(adjective, hard, evil, heavy)
9
cryptic(adjective, hard, evil, humble)
9
hidden(adjective, hard, evil, complex)
9
impenetrable(adjective, set, solid, heavy)
8
far(adjective, adverb, down, humble)
7
intricate(adjective, hard, evil, heavy)
7
complex(adjective, hard, delicate, meaning)
6
mystical(adjective, hard, evil, delicate)
6
scholarly(adjective, smart, bright, rational)
5
complicated(adjective, hard, evil, heavy)
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APASmart Define. (2016). deep thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/deep/thesaurus/synonyms
ChicagoSmart Define. 2016. "deep thesaurus" https://smartdefine.org/deep/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, deep thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/deep/thesaurus/synonyms>.
MLASmart Define. "deep thesaurus" 24 March 2016. Web. 23 September 2026. <https://smartdefine.org/deep/thesaurus/synonyms>