bushing vs liner

bushing and liner both are nouns.

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

As nouns, liner is a hypernym of bushing; that is, liner is a word with a broader meaning than bushing:

Other hypernyms of bushing include lining.

bushing (noun)	liner (noun)
a cylindrical metal lining used to reduce friction	(baseball) a hit that flies straight out from the batter
an insulating liner in an opening through which conductors pass	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