lily vs pine lily

lily and pine lily both are nouns.

Word	Noun	Adjective	Verb	Adverb
lily	Yes	No	No	No
pine lily	Yes	No	No	No

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

lily: any liliaceous plant of the genus Lilium having showy pendulous flowers
pine lily: lily of southeastern United States having cup-shaped flowers with deep yellow to scarlet recurved petals

lily (noun)	pine lily (noun)
any liliaceous plant of the genus Lilium having showy pendulous flowers	lily of southeastern United States having cup-shaped flowers with deep yellow to scarlet recurved petals