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Parent Categories

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

waste, waste material, waste matter, waste product go
any materials unused and rejected as worthless or unwanted

pollutant
waste matter that contaminates the water or air or soil

noun.substance

5 Subcategories

dichlorodiphenyltrichloroethane, DDT go
an insecticide that is also toxic to animals and humans
chlorofluorocarbon, CFC go
a fluorocarbon with chlorine
halon go
a compound in which the hydrogen atoms of a hydrocarbon have been replaced by bromine and other halogen atoms
nitrogen oxide go
any of several oxides of nitrogen formed by the action of nitric acid on oxidizable materials
sulfur dioxide, sulphur dioxide go
a colorless toxic gas (SO2) that occurs in the gases from volcanoes