liner vs luxury liner

liner and luxury liner both are nouns.

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

As nouns, luxury liner is a hyponym of liner; that is, luxury 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)
luxury liner: a liner equipped for sumptuous living

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

liner (noun)	luxury liner (noun)
(baseball) a hit that flies straight out from the batter	a liner equipped for sumptuous living
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