webbing or infilling: The vault surface between the ribs of a rib vault.

Compare with rib

west end : The area of the church opposite the east end. The west end usually functions as the main entrance to the church.

Contrast with east end
See also: screen facade, narthex. westwork

westwork(from German Westwerk): An entrance area at the west end of a church with upper chamber and usually with a tower or towers. It is normally broader than the width of the nave and aisles. Westwork is sometimes used synonymously with narthex.

Compare with: narthex, screen facade