liner vs cruise liner

liner and cruise liner both are nouns.

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

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

liner: a large commercial ship (especially one that carries passengers on a regular schedule)
cruise liner: a passenger ship used commercially for pleasure cruises

Other hyponyms of liner include cabin liner, cargo liner, cruise ship, express luxury liner, luxury liner.

liner (noun)	cruise liner (noun)
(baseball) a hit that flies straight out from the batter	a passenger ship used commercially for pleasure cruises
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