IOC vs International Olympic Committee

IOC and International Olympic Committee both are nouns.

Word	Noun	Adjective	Verb	Adverb
IOC	Yes	No	No	No
International Olympic Committee	Yes	No	No	No

As nouns, IOC and International Olympic Committee are synonyms defined as:

IOC and International Olympic Committee: organization responsible for organizing the modern Olympic Games

Other synonyms of IOC include I.O.C..

IOC (noun)	International Olympic Committee (noun)
organization responsible for organizing the modern Olympic Games	organization responsible for organizing the modern Olympic Games