THESAURUS
back stairs
back door, back road, back street, back way, bolt-hole, by-lane, bypass, bypath, byroad, bystreet, byway, companion, companionway, covert way, detour, escalier, escalier derobe, escape hatch, escape route, fire escape, flight of steps, incline, landing, landing stage, perron, ramp, roundabout way, secret exit, secret passage, secret staircase, side door, side road, side street, spiral staircase, staircase, stairs, stairway, stepping-stones, steps, stile, treads and risers, underground, underground railroad, underground route
ROGET THESAURUS
back stairs
Ambush
N
ambush, camouflage, mimicry, hiding place, secret place, secret drawer, recess, hold, holes and corners, closet, crypt, adytum, abditory, oubliette, ambush, ambuscade, stalking horse, lurking hole, lurking place, secret path,
back stairs, retreat, screen, cover, shade, blinker, veil, curtain, blind, cloak, cloud, mask, visor, vizor, disguise, masquerade dress, domino, pitfall, trap, camouflaged, hidden, concealed, aux aguets.