| furtive(adjective, honest, dishonest, deceitful, secret) |
| clandestine(adjective, dishonest, deceitful, secret, hidden) |
| stealthy(adjective, quiet, dishonest, secret, sly) |
| secret(adjective, dishonest, deceitful, hidden, sly) |
| sneaky(adjective, honest, dishonest, deceitful, sly) |
| covert(adjective, secret, hidden, sly, clandestine) |
| underhand(adjective, dishonest, deceitful, secret, sly) |
| sly(adjective, honest, dishonest, deceitful, secret) |
| undercover(adjective, dishonest, secret, hidden, spy) |
| hidden(verb, adjective, secret, clandestine, underground) |
| hush-hush(adjective, dishonest, secret, hidden, sneaky) |
| private(adjective, secret, unknown, hidden, clandestine) |
| underground(adjective, secret, unknown, hidden, concealed) |
| hugger-mugger(adjective, quiet, intriguing) |
| indirect(adjective, obscure, dishonest, cunning, deceitful) |
| secretive(adjective, mean, smooth, honest, dishonest) |
| concealed(adjective, dishonest, cunning, secret, hidden) |
| hole-and-corner(adjective, secret, hidden, spy, sneaky) |
| insidious(adjective, mean, smooth, dishonest, deceitful) |
| skulking(adjective, secret, concealment, sneaky, covert) |