Charnel adj. Containing the bodies of the dead. "Charnel vaults."
Charnel house, a tomb, vault, cemetery, or other place where the bones of the dead are deposited; originally, a place for the bones thrown up when digging new graves in old burial grounds.
... tombstones, and broken slabs which appear to cover family vaults, trip you up at every step. Every yard of progress is made with difficulty, and you move nervously among the tall rank nettles in momentary fear of dislocating your ankle, or of being suddenly precipitated into the reeking charnel house of some defunct Mayo family. The Connaught dead seem to be very exclusive. Most of the ground is enclosed in small squares, each having a low stone wall, half-a-yard thick, with what looks like the gable-end of a stone cottage at the west end. Seen from a distance the churchyard looks like a ruined ... — Ireland as It Is - And as It Would be Under Home Rule • Robert John Buckley (AKA R.J.B.)