CFC vs pollutant

CFC and pollutant both are nouns.

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

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

CFC: a fluorocarbon with chlorine; formerly used as a refrigerant and as a propellant in aerosol cans
pollutant: waste matter that contaminates the water or air or soil

Other hypernyms of CFC include fluorocarbon, greenhouse emission, greenhouse gas.

CFC (noun)	pollutant (noun)
a fluorocarbon with chlorine; formerly used as a refrigerant and as a propellant in aerosol cans	waste matter that contaminates the water or air or soil