| unparalleled(adjective, unusual, exceptional, special) |
| unwonted(unusual, strange, special, rare) |
| concealed(strange, remote, mysterious, indefinite) |
| desolate(strange, remote, mysterious, indefinite) |
| hidden(strange, remote, mysterious, indefinite) |
| incog(strange, remote, mysterious, indefinite) |
| incognito(strange, remote, indefinite, unidentified) |
| little known(expression, strange, remote, mysterious) |
| nameless(strange, remote, mysterious, indefinite) |
| obscure(strange, unknown, indefinite, untried) |
| original(unusual, exceptional, special, fantastic) |
| out-of-the-way(exceptional, fantastic, original, unknown) |
| secret(strange, remote, mysterious, indefinite) |
| so-and-so(strange, remote, mysterious, indefinite) |
| such-and-such(strange, remote, mysterious, indefinite) |
| unapprehended(strange, remote, mysterious, indefinite) |
| unascertained(strange, remote, mysterious, indefinite) |
| uncelebrated(strange, remote, mysterious, indefinite) |
| uncharted(adjective, strange, remote, mysterious) |
| uncustomary(unusual, strange, special, rare) |