What is an excavation in the earth as a place for interment referred to?

The term "grave" specifically refers to an excavation in the earth designed for interment, which is the act of burying a deceased individual. It typically signifies a simple burial place where a body is placed in the ground and covered with soil.

In contrast, a "tomb" usually denotes a more elaborate structure that may house multiple individuals or serve as a memorial site, and it is often built to stand above ground. A "crypt" can be seen as a subset of a tomb, typically referring to an underground chamber that may also house coffins and memorials. The term "burial plot" is often used in the context of a designated area within a cemetery for the purpose of interment, but it doesn't exclusively denote the actual excavation itself. Thus, while all these terms relate to burial practices, "grave" is the most accurate descriptor for an excavation specifically meant for interment.