| hidden(verb, adjective, show, obscure, dark) |
| secret(adjective, quiet, show, secret, hidden) |
| concealed(adjective, show, dark, secret, unknown) |
| clandestine(adjective, quiet, show, secret, hidden) |
| private(adjective, close, quiet, secret, hidden) |
| surreptitious(adjective, secret, hidden, sly, clandestine) |
| furtive(adjective, secret, reticent, unknown, sly) |
| hush-hush(adjective, show, informal, secret, hidden) |
| veiled(adjective, secret, unknown, hidden, clandestine) |
| undercover(adjective, show, secret, reticent, hidden) |
| stealthy(adjective, quiet, secret, hidden, sly) |
| man cave |
| latent(adjective, hidden, concealment, dormant, invisible) |
| ulterior(adjective, show, secret, hidden, clandestine) |
| underhand(adjective, mean, secret, hidden, sly) |
| disguised(adjective, secret, hidden, clandestine, imperceptible) |
| sanctuary(noun, place, cover, attack, protection) |
| cover(noun, adjective, attack, obscure, protection) |
| invisible(adjective, hidden, unable, invisible, latent) |
| privy(adjective, obscure, dark, secret, hidden) |