brake system vs brakes

brake system and brakes both are nouns.

Word	Noun	Adjective	Verb	Adverb
brake system	Yes	No	No	No
brakes	Yes	No	No	No

As nouns, brake system and brakes are synonyms defined as:

brake system and brakes: a braking device consisting of a combination of interacting parts that work to slow a motor vehicle

brake system (noun)	brakes (noun)
a braking device consisting of a combination of interacting parts that work to slow a motor vehicle	a braking device consisting of a combination of interacting parts that work to slow a motor vehicle