Commonly used terms in the funeral industry and their definitions:
 
Burial Vault: This is oblong concrete box that is placed into the ground to house a casket.
Casket: An oblong box made of wood, metal, copper, or bronze to hold a dead human body for burial.
Columbarium: An above ground structure designed with numerus openings called Niches which will hold cremated human remains.
Cremation: This is the process of using extreme heat to reduce a dead human body to ash.
Cremains: The Ash remaining after the cremation of a dead human body.
Crypt:  Is a stone chamber beneath the floor of a church or mausoleum. It typically contains coffins.
Entombment: The act of placing of a dead body in a crypt or chamber.
Grave, Plot: It is a place of burial for a dead body, typically a hole dug in the ground and marked by a stone or mound.
Interment: The burial of corpse in a grave or tomb, typically with funeral rites.
Inurnment: the act of placing a cremation urn in a grave or niche.
Mausoleum: A building, especially a large and stately one, housing a tombs or crypts.