United States Department of State vs State Department

United States Department of State and State Department both are nouns.

Word	Noun	Adjective	Verb	Adverb
United States Department of State	Yes	No	No	No
State Department	Yes	No	No	No

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

United States Department of State and State Department: the federal department in the United States that sets and maintains foreign policies

Other synonyms of United States Department of State include Department of State, DoS, State.

United States Department of State (noun)	State Department (noun)
the federal department in the United States that sets and maintains foreign policies	the federal department in the United States that sets and maintains foreign policies
	a department of government in one of the 50 states