access, approach - a way of entering or leaving; "he took a wrong turn on the access to the bridge"

archway, arch - a passageway under an arch

doorway, room access, door, threshold - the entrance (the space in a wall) through which you enter or leave a room or building; the space that a door can close; "he stuck his head in the doorway"

gateway - an entrance that can be closed by a gate

hatchway, scuttle, opening - an entrance equipped with a hatch; especially a passageway between decks of a ship

pithead - the entrance to a coal mine

portal - a grand and imposing entrance (often extended metaphorically); "the portals of the cathedral"; "the portals of heaven"; "the portals of success"

porte-cochere - a carriage entrance passing through a building to an enclosed courtyard

servant's entrance, service door, service entrance - an entrance intended for the use of servants or for delivery of goods and removal of refuse

stage door - an entrance to the backstage area of theater; used by performers and other theater personnel

vomitory - an entrance to an amphitheater or stadium