lily vs liliaceous plant

lily and liliaceous plant both are nouns.

Word	Noun	Adjective	Verb	Adverb
lily	Yes	No	No	No
liliaceous plant	Yes	No	No	No

As nouns, liliaceous plant is a hypernym of lily; that is, liliaceous plant is a word with a broader meaning than lily:

lily: any liliaceous plant of the genus Lilium having showy pendulous flowers
liliaceous plant: plant growing from a bulb or corm or rhizome or tuber

lily (noun)	liliaceous plant (noun)
any liliaceous plant of the genus Lilium having showy pendulous flowers	plant growing from a bulb or corm or rhizome or tuber