Foreign Service vs State Department

Foreign Service and State Department both are nouns.

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

Foreign Service (noun)	State Department (noun)
the part of the State Department that supplies diplomats for the United States embassies and consulates around the world	the federal department in the United States that sets and maintains foreign policies
	a department of government in one of the 50 states