Synonyms and related words :
French door, apse, arcade, arcature, arch, arched roof, back door, barway, bulkhead, camber, carriage entrance, ceilinged roof, cellar door, cellarway, concameration, concha, cove, cupola, dome, door, doorjamb, doorpost, doorway, front door, gate, gatepost, gateway, geodesic dome, hatch, hatchway, igloo, keystone, lintel, ogive, porch, portal, porte cochere, postern, propylaeum, pylon, scuttle, side door, skewback, span, stile, storm door, threshold, tollgate, trap, trap door, turnpike, turnstile, vault, vaulting, voussoir