service department vs garage

service department and garage both are nouns.

Word	Noun	Adjective	Verb	Adverb
service department	Yes	No	No	No
garage	Yes	No	Yes	No

As nouns, service department and garage are synonyms defined as:

service department and garage: a repair shop where cars and trucks are serviced and repaired

service department (noun)	garage (noun)
a repair shop where cars and trucks are serviced and repaired	an outbuilding (or part of a building) for housing automobiles
the division of a business that provides customer services	a repair shop where cars and trucks are serviced and repaired

service department (verb)	garage (verb)
	keep or store in a garage