| unknown(adjective, obscure, strange, mysterious, indefinite) |
| able |
| mysterious(strange, new, remote, indefinite, unidentified) |
| strange(new, remote, mysterious, indefinite, unidentified) |
| uncharted(strange, new, remote, mysterious, indefinite) |
| undiscovered(strange, new, remote, mysterious, indefinite) |
| unexplained(strange, new, remote, mysterious, indefinite) |
| unexplored(strange, new, remote, mysterious, indefinite) |
| unfamiliar(strange, new, remote, mysterious, indefinite) |
| unheard-of(strange, new, remote, indefinite, unidentified) |
| unidentified(strange, new, remote, mysterious, indefinite) |
| unperceived(strange, new, remote, mysterious, indefinite) |
| unrevealed(strange, new, remote, mysterious, indefinite) |
| X(strange, new, remote, mysterious, indefinite) |
| alien(strange, new, remote, mysterious, indefinite) |
| anonymous(strange, indefinite, unidentified) |
| concealed(strange, new, remote, mysterious, indefinite) |
| desolate(strange, new, remote, mysterious, indefinite) |
| distant(strange, new, remote, mysterious, indefinite) |
| enigmatic |