EC vs Common Market

EC and Common Market both are nouns.

Word	Noun	Adjective	Verb	Adverb
EC	Yes	No	No	No
Common Market	Yes	No	No	No

As nouns, EC and Common Market are synonyms defined as:

EC and Common Market: an international organization of European countries formed after World War II to reduce trade barriers and increase cooperation among its members

EC (noun)	Common Market (noun)
an international organization of European countries formed after World War II to reduce trade barriers and increase cooperation among its members	an international organization of European countries formed after World War II to reduce trade barriers and increase cooperation among its members