Synonyms and related words :
WC, alive to, anonymous, appreciative of, apprised of, awake to, aware of, back-door, backhouse, backstairs, basement, bathroom, behind the curtain, behind the scenes, bog, buried, can, clandestine, closet, cognizant of, comfort station, concealed, conscious of, convenience, covert, crapper, earth closet, feline, furtive, head, hep to, hidden, hidlings, hole-and-corner, hugger-mugger, in the know, in the secret, incognito, informed of, inmost, innermost, interior, intimate, inward, isolated, jakes, john, johnny, johnny house, latrine, lavatory, let into, loo, mindful of, necessary, no stranger to, obscured, office, on to, outhouse, personal, powder room, private, privileged, privy to, quiet, rest room, retired, secluded, secret, seized of, sensible of, sensible to, sequestered, shifty, shrouded, skulking, slinking, slinky, sly, sneaking, sneaky, stealthy, streetwise, surreptitious, toilet, toilet room, undeceived, under-the-counter, under-the-table, undercover, underground, underhand, underhanded, unobtrusive, urinal, washroom, water closet, wise to, withdrawn