Treasury Department vs United States Treasury

Treasury Department and United States Treasury both are nouns.

Word	Noun	Adjective	Verb	Adverb
Treasury Department	Yes	No	No	No
United States Treasury	Yes	No	No	No

As nouns, Treasury Department and United States Treasury are synonyms defined as:

Treasury Department and United States Treasury: the federal department that collects revenue and administers federal finances; the Treasury Department was created in 1789

Other synonyms of Treasury Department include Department of the Treasury, Treasury.

Treasury Department (noun)	United States Treasury (noun)
the federal department that collects revenue and administers federal finances; the Treasury Department was created in 1789	the federal department that collects revenue and administers federal finances; the Treasury Department was created in 1789