bureau vs agency

bureau and agency both are nouns.

Word	Noun	Adjective	Verb	Adverb
bureau	Yes	No	No	No
agency	Yes	No	No	No

As nouns, bureau and agency are synonyms defined as:

Other synonyms of bureau include authority, federal agency, government agency, office.

bureau (noun)	agency (noun)
furniture with drawers for keeping clothes	to have the ability to produce a particular effect or achieve an end
an administrative unit of government	an administrative unit of government
	a business or organization that provides a particular service, especially the mediation of transactions between two parties
	the state of serving as an official and authorized delegate or agent
	the state of being in action or exerting power