US Attorney General vs United States Attorney General

US Attorney General and United States Attorney General both are nouns.

Word	Noun	Adjective	Verb	Adverb
US Attorney General	Yes	No	No	No
United States Attorney General	Yes	No	No	No

As nouns, US Attorney General and United States Attorney General are synonyms defined as:

US Attorney General and United States Attorney General: the person who holds the position of secretary of the Justice Department

Other synonyms of US Attorney General include Attorney General.

US Attorney General (noun)	United States Attorney General (noun)
the person who holds the position of secretary of the Justice Department	the person who holds the position of secretary of the Justice Department