MASS (or energy density) is the name we give to the property of matter which causes curvature of space-time
You mean Gravitational mass.
EDIT: got testered
Given this was a discussion about gravity I thought that was assumed. Obviously not.
Mass is a far more common term than either gravitational mass or inertial mass, which typically only used when being careful about which you are referring to.
typically only used when being careful about which you are referring to
Being careful about that to which you are referring is at the core of this thread.
@Backstop started
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You mean Gravitational mass.
EDIT: got testered