International Olympic Committee vs IOC

International Olympic Committee and IOC both are nouns.

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

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

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

Other synonyms of International Olympic Committee include I.O.C..

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