| abstruse(noun, adjective, sound, easy, evil) |
| arcane(adjective, evil, obscure, strange, deep) |
| obscure(adjective, dark, sophisticated, mysterious, secret) |
| dark(adjective, obscure, mysterious, hidden, secret) |
| mysterious(adjective, evil, obscure, dark, strange) |
| occult(noun, adjective, evil, obscure, dark) |
| esoteric(adjective, sound, easy, evil, sharp) |
| deep(adjective, sound, easy, evil, obscure) |
| cryptic(adjective, evil, sharp, obscure, difficult) |
| profound(adjective, easy, obscure, heavy, thoughtful) |
| secret(adjective, evil, obscure, dark, strange) |
| hidden(verb, adjective, evil, obscure, difficult) |
| concealed(adjective, evil, obscure, dark, strange) |
| incomprehensible(adjective, obscure, dark, strange, uncertain) |
| enigmatic(adjective, evil, sharp, obscure, difficult) |
| mystic(adjective, evil, obscure, dark, deep) |
| unfathomable(adjective, obscure, dark, uncertain, sophisticated) |
| mystical(adjective, evil, obscure, dark, strange) |
| heavy(adjective, easy, severe, obscure, slang) |
| difficult(adjective, hard, fancy, obscure, strange) |