Freon vs CFC

Freon and CFC both are nouns.

Word	Noun	Adjective	Verb	Adverb
Freon	Yes	No	No	No
CFC	Yes	No	No	No

As nouns, CFC is a hypernym of Freon; that is, CFC is a word with a broader meaning than Freon:

Freon: any one or more chlorofluorocarbons (or related compounds) that are used as an aerosol propellant, organic solvent, or refrigerant
CFC: a fluorocarbon with chlorine; formerly used as a refrigerant and as a propellant in aerosol cans

Other hypernyms of Freon include chlorofluorocarbon.

Freon (noun)	CFC (noun)
any one or more chlorofluorocarbons (or related compounds) that are used as an aerosol propellant, organic solvent, or refrigerant	a fluorocarbon with chlorine; formerly used as a refrigerant and as a propellant in aerosol cans