French door archway back door back road back stairs back street back way barway bolt-hole bulkhead by-lane bypass bypath byroad bystreet byway carriage entrance cellar door cellarway covert way detour door doorjamb doorpost doorway escalier derobe escape hatch escape route front door gate gatepost gateway hatch hatchway lintel porch portal porte cochere postern propylaeum pylon roundabout way scuttle secret exit secret passage secret staircase side road side street stile storm door threshold tollgate trap trap door turnpike turnstile underground underground railroad underground route