wood lily vs liliaceous plant

wood lily and liliaceous plant both are nouns.

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

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

wood lily: any liliaceous plant of the genus Trillium having a whorl of three leaves at the top of the stem with a single three-petaled flower
liliaceous plant: plant growing from a bulb or corm or rhizome or tuber

wood lily (noun)	liliaceous plant (noun)
lily of eastern North America having orange to orange-red purple-spotted flowers	plant growing from a bulb or corm or rhizome or tuber
any liliaceous plant of the genus Trillium having a whorl of three leaves at the top of the stem with a single three-petaled flower