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entity go
that which is perceived or known or inferred to have its own distinct existence (living or nonliving)

physical entity go
an entity that has physical existence

matter go
that which has mass and occupies space

substance go
the real physical matter of which a person or thing consists

material, stuff go
the tangible substance that goes into the makeup of a physical object

mineral go
solid homogeneous inorganic substances occurring in nature having a definite chemical composition

corundom, corundum
very hard mineral used as an abrasive

noun.substance

3 Subcategories

alumina, aluminum oxide, aluminium oxide go
any of various forms of aluminum oxide occurring naturally as corundum
ruby go
a transparent deep red variety of corundum
sapphire go
a precious transparent stone of rich blue corundum valued as a gemstone