service bureau vs service agency

service bureau and service agency both are nouns.

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

As nouns, service bureau and service agency are synonyms defined as:

service bureau and service agency: a business that makes its facilities available to others for a fee; achieves economy of scale

Other synonyms of service bureau include service firm.

service bureau (noun)	service agency (noun)
a business that makes its facilities available to others for a fee; achieves economy of scale	a business that makes its facilities available to others for a fee; achieves economy of scale