daylily vs liliaceous plant

daylily and liliaceous plant both are nouns.

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

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

daylily: any of numerous perennials having tuberous roots and long narrow bladelike leaves and usually yellow lily-like flowers that bloom for only a day
liliaceous plant: plant growing from a bulb or corm or rhizome or tuber

daylily (noun)	liliaceous plant (noun)
any of numerous perennials having tuberous roots and long narrow bladelike leaves and usually yellow lily-like flowers that bloom for only a day	plant growing from a bulb or corm or rhizome or tuber