liner vs brake lining

liner and brake lining both are nouns.

Word	Noun	Adjective	Verb	Adverb
liner	Yes	No	No	No
brake lining	Yes	No	No	No

As nouns, brake lining is a hyponym of liner; that is, brake lining is a word with a more specific, narrower meaning than liner:

liner: a protective covering that protects an inside surface
brake lining: the lining on the brake shoes that comes in contact with the brake drum

Other hyponyms of liner include bushing, cylindrical lining, facing, furnace lining, refractory.

liner (noun)	brake lining (noun)
(baseball) a hit that flies straight out from the batter	the lining on the brake shoes that comes in contact with the brake drum
a large commercial ship (especially one that carries passengers on a regular schedule)
a piece of cloth that is used as the inside surface of a garment
a protective covering that protects an inside surface