ocean liner vs liner

ocean liner and liner both are nouns.

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

As nouns, ocean liner and liner are synonyms defined as:

ocean liner and liner: a large commercial ship (especially one that carries passengers on a regular schedule)

ocean liner (noun)	liner (noun)
a large commercial ship (especially one that carries passengers on a regular schedule)	(baseball) a hit that flies straight out from the batter
	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