Energy Department vs DOE

Energy Department and DOE both are nouns.

Word	Noun	Adjective	Verb	Adverb
Energy Department	Yes	No	No	No
DOE	Yes	No	No	No

As nouns, Energy Department and DOE are synonyms defined as:

Energy Department and DOE: the federal department responsible for maintaining a national energy policy of the United States; created in 1977

Other synonyms of Energy Department include Department of Energy, Energy.

Energy Department (noun)	DOE (noun)
the federal department responsible for maintaining a national energy policy of the United States; created in 1977	the federal department responsible for maintaining a national energy policy of the United States; created in 1977