brakes vs brake system

brakes and brake system both are nouns.

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

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

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

brakes (noun)	brake system (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