USAF vs U. S. Air Force

USAF and U. S. Air Force both are nouns.

Word	Noun	Adjective	Verb	Adverb
USAF	Yes	No	No	No
U. S. Air Force	Yes	No	No	No

As nouns, USAF and U. S. Air Force are synonyms defined as:

USAF and U. S. Air Force: the airforce of the United States of America; the agency that defends the United States through control and exploitation of air and space

Other synonyms of USAF include Air Force, United States Air Force, US Air Force.

USAF (noun)	U. S. Air Force (noun)
the airforce of the United States of America; the agency that defends the United States through control and exploitation of air and space	the airforce of the United States of America; the agency that defends the United States through control and exploitation of air and space