garage vs service department

garage and service department both are nouns.

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

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

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

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

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