chamber - a natural or artificial enclosed space

crypt - a cellar or vault or underground burial chamber (especially beneath a church)

tomb, grave - a place for the burial of a corpse (especially beneath the ground and marked by a tombstone); "he put flowers on his mother's grave"

Holy Sepulcher, Holy Sepulchre - the sepulcher in which Christ's body lay between burial and resurrection

mausoleum - a large burial chamber, usually above ground

monument, repository - a burial vault (usually for some famous person)

burial vault, vault - a burial chamber (usually underground)