service bureau vs service firm

service bureau and service firm both are nouns.

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

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

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

Other synonyms of service bureau include service agency.

service bureau (noun)	service firm (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