hellebore vs liliaceous plant

hellebore and liliaceous plant both are nouns.

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

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

hellebore (noun)	liliaceous plant (noun)
any plant of the Eurasian genus Helleborus	plant growing from a bulb or corm or rhizome or tuber
perennial herbs of the lily family having thick toxic rhizomes