ACC vs USAF

ACC and USAF both are nouns.

Word	Noun	Adjective	Verb	Adverb
ACC	Yes	No	No	No
USAF	Yes	No	No	No

ACC (noun)	USAF (noun)
a command that is the primary provider of air combat weapon systems to the United States Air Force; operates fighter, bomber, reconnaissance, battle-management, and rescue aircraft	the airforce of the United States of America; the agency that defends the United States through control and exploitation of air and space