Freon and Halon

Freon noun - Any one or more chlorofluorocarbons (or related compounds) that are used as an aerosol propellant, organic solvent, or refrigerant.

Halon and freon are semantically related. In some cases you can use "Halon" instead a noun "Freon".

Halon noun - A compound in which the hydrogen atoms of a hydrocarbon have been replaced by bromine and other halogen atoms; very stable; used in fire extinguishers although it is thought to release bromine that depletes the ozone layer.

Freon and halon are semantically related. You can use "Freon" instead a noun "Halon".