| unknown(adjective, obscure, strange, mysterious, secret) |
| nameless(adjective, new, remote, mysterious, secret) |
| unnamed(adjective, strange, secret, unknown, indefinite) |
| anonymous(adjective, strange, choice, secret, unknown) |
| unfamiliar(adjective, strange, new, remote, mysterious) |
| mysterious(adjective, strange, new, remote, secret) |
| unrecognized(adjective, strange, new, remote, mysterious) |
| unspecified(adjective, ordinary, vague, unknown, indefinite) |
| unsung(adjective, strange, new, remote, indefinite) |
| incognito(adjective, new, remote, unknown, indefinite) |
| obscure(adjective, strange, secret, unknown, hidden) |
| undesignated |
| unheard-of(adjective, strange, new, remote, indefinite) |
| strange(adjective, new, remote, mysterious, indefinite) |
| uncharted(adjective, strange, new, remote, mysterious) |
| unmarked(adjective, secret) |
| unrevealed(adjective, strange, new, remote, mysterious) |
| general |
| undiscovered(adjective, strange, new, remote, mysterious) |
| unexplored(adjective, strange, new, remote, mysterious) |