Catacomb and Mortuary

Catacomb noun - An underground tunnel with recesses where bodies were buried (as in ancient Rome).

Mortuary and catacomb are semantically related. In some cases you can use "Mortuary" instead a noun "Catacomb".

Mortuary noun - A building (or room) where dead bodies are kept before burial or cremation.

Catacomb and mortuary are semantically related. Sometimes you can use "Catacomb" instead a noun "Mortuary".