| dark(adjective, obscure, superior, mysterious, unknown) |
| insensible(adjective, knowledge, hidden, unable) |
| unnoticeable(adjective, knowledge, hidden, unable, imperceptible) |
| unperceivable(adjective, hidden, unable) |
| unrevealed(adjective, obscure, dark, superior, deep) |
| veiled(adjective, obscure, deep, hidden, unable) |
| imponderable(adjective, knowledge, hidden, unable, imperceptible) |
| masked(adjective, hidden, unable) |
| secret(obscure, dark, superior, unknown, hidden) |
| supernatural(adjective, obscure, dark, mysterious, hidden) |
| undisclosed(adjective, obscure, dark, unknown, hidden) |
| atomic |
| unexposed(adjective, obscure, dark, unknown, hidden) |
| Spirit(noun, great, powerful, god) |
| buried(adjective, concealment, latent) |
| disguised(adjective, hidden, unable) |
| evanescent(adjective, littleness) |
| undetectable |
| undetected(obscure, dark, secret, unknown, hidden) |
| viewless |