Synonyms to treads and risers

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, underground, underground railroad, underground route, Bayard, Don Quixote, Gawain, Lancelot, Ritter, Sidney, Sir Galahad, abigail, accompanier, accompanist, accompanyist, ace, adjunct, ally, alter ego, amah, amiable, amigo, analogon, analogue, associate, attend, attendant, au pair girl, ayah, bachelor, back, balance rudder, banneret, baronet, batten, beak, beakhead, beam, bear, bedfellow, bedmate, betweenmaid, biddy, bilge keelson, bitt, board, bodyguard, bollard, bollard timber, bosom buddy, bow, bracket plate, bridge, bring, brother, brother-in-arms, buddy, bulkhead, bulwarks, bunkie, bunkmate, butty, cab