55 entries under underground topic. ×

29
occult(noun, adjective, knowledge, evil, obscure)
22
mysterious(adjective, knowledge, evil, obscure, solid)
22
mystical(adjective, knowledge, evil, obscure, dark)
20
secret(adjective, hard, evil, obscure, dark)
19
cryptic(adjective, knowledge, evil, obscure, dark)
16
arcane(adjective, knowledge, evil, obscure, solid)
15
esoteric(adjective, evil, obscure, dark, deep)
13
dark(adjective, evil, obscure, solid, superior)
13
recondite(adjective, evil, obscure, dark, deep)
11
hidden(adjective, evil, obscure, solid, dark)
7
abstruse(adjective, evil, obscure, dark, deep)
3
ambiguous(adjective, obscure, strange, uncertainty, vague)
3
deep(adjective, hard, evil, obscure, heavy)
1
confidential(adjective, clandestine, undisclosed)
1
surreptitious(adjective, secret, unknown, hidden)
1
undercover(adjective, secret, unknown, hidden)
1
secretive(clandestine, undisclosed)
1
strange(obscure, unknown, clandestine, undisclosed)
1
unintelligible(adjective, obscure, solid, dark, superior)
0
cloak-and-dagger(obscure, unknown, clandestine, undisclosed)
<123>
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APASmart Define. (2015). mystic thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/mystic/thesaurus/synonyms
ChicagoSmart Define. 2015. "mystic thesaurus" https://smartdefine.org/mystic/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, mystic thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/mystic/thesaurus/synonyms>.
MLASmart Define. "mystic thesaurus" 14 April 2015. Web. 28 September 2026. <https://smartdefine.org/mystic/thesaurus/synonyms>