Government Printing Office vs legislative branch

Government Printing Office and legislative branch both are nouns.

Word	Noun	Adjective	Verb	Adverb
Government Printing Office	Yes	No	No	No
legislative branch	Yes	No	No	No

Government Printing Office (noun)	legislative branch (noun)
an agency of the legislative branch that provides printing and binding services for Congress and the departments and establishments of the federal government	the branch of the United States government that has the power of legislating