hydraulic brake cylinder vs master cylinder

hydraulic brake cylinder and master cylinder both are nouns.

Word	Noun	Adjective	Verb	Adverb
hydraulic brake cylinder	Yes	No	No	No
master cylinder	Yes	No	No	No

As nouns, hydraulic brake cylinder and master cylinder are synonyms defined as:

hydraulic brake cylinder and master cylinder: a cylinder that contains brake fluid that is compressed by a piston

Other synonyms of hydraulic brake cylinder include brake cylinder.

hydraulic brake cylinder (noun)	master cylinder (noun)
a cylinder that contains brake fluid that is compressed by a piston	a cylinder that contains brake fluid that is compressed by a piston