State vs State Department

State and State Department both are nouns.

Word	Noun	Adjective	Verb	Adverb
State	Yes	No	No	No
State Department	Yes	No	No	No

As nouns, State and State Department are synonyms defined as:

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

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

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