United States Air Force vs U. S. Air Force

United States Air Force and U. S. Air Force both are nouns.

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

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

United States Air Force 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 United States Air Force include Air Force, US Air Force, USAF.

United States Air Force (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