DoS vs Foggy Bottom

DoS and Foggy Bottom both are nouns.

Word	Noun	Adjective	Verb	Adverb
DoS	Yes	No	No	No
Foggy Bottom	Yes	No	No	No

As nouns, Foggy Bottom is a hyponym of DoS; that is, Foggy Bottom is a word with a more specific, narrower meaning than DoS:

DoS: the federal department in the United States that sets and maintains foreign policies
Foggy Bottom: United States Department of State, which is housed in a building in a low-lying area of Washington near the Potomac River

DoS (noun)	Foggy Bottom (noun)
the federal department in the United States that sets and maintains foreign policies	United States Department of State, which is housed in a building in a low-lying area of Washington near the Potomac River