| secret(adjective, show, full, hidden, clandestine) |
| clandestine(adjective, show, full, secret, sly) |
| hush-hush(adjective, show, informal, full, secret) |
| surreptitious(adjective, full, secret, clandestine, underground) |
| undercover(adjective, show, full, secret, sly) |
| hole-and-corner |
| hugger-mugger(adjective, full) |
| covert(adjective, show, full, secret, clandestine) |
| underground(adjective, obscure, unknown, hidden, clandestine) |
| intriguing(adjective, full) |
| melodramatic(adjective, behavior, extravagant, histrionic, overemotional) |
| hidden(clandestine, underground, fraudulent, undisclosed) |
| mysterious(adjective, obscure, full, unknown, clandestine) |
| sensational(behavior, theatrical, histrionic, overemotional) |
| sly(adjective, full, clandestine, underground, fraudulent) |
| sneaky(adjective, full, sly, clandestine, underground) |
| stealthy(adjective, full, clandestine, underground, undisclosed) |
| under wraps(expression, adjective, idiom, show, secret) |
| yellow |
| artful(hidden, sly, fraudulent) |