liner vs bushing

liner and bushing both are nouns.

Word	Noun	Adjective	Verb	Adverb
liner	Yes	No	No	No
bushing	Yes	No	No	No

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

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

liner (noun)	bushing (noun)
(baseball) a hit that flies straight out from the batter	a cylindrical metal lining used to reduce friction
a large commercial ship (especially one that carries passengers on a regular schedule)	an insulating liner in an opening through which conductors pass
a piece of cloth that is used as the inside surface of a garment
a protective covering that protects an inside surface