| backstairs(close, restricted, clandestine, underground, discreet) |
| behaved |
| belied |
| bulled |
| clandestine(secret, hidden, underground, undisclosed, underhanded) |
| classified(clandestine, underground, undisclosed) |
| close(clandestine, underground, undisclosed, furtive) |
| confidential(restricted, clandestine, underground, discreet, undisclosed) |
| cryptic(close, clandestine, underground, undisclosed, furtive) |
| discreet(close, restricted, clandestine, underground, undisclosed) |
| furtive(adjective, close, secret, hidden, clandestine) |
| harbored |
| hush-hush(secret, hidden, clandestine, underground, undisclosed) |
| in ambush(expression, close, restricted, clandestine, underground) |
| incog(secret, hidden, clandestine, underground, underhanded) |
| incognito(close, secret, restricted, hidden, clandestine) |
| inside(close, restricted, clandestine, underground, discreet) |
| involved |
| masqueraded |
| obscured(secret, hidden, clandestine, underground, underhanded) |