lenten rose vs hellebore

lenten rose and hellebore both are nouns.

Word	Noun	Adjective	Verb	Adverb
lenten rose	Yes	No	No	No
hellebore	Yes	No	No	No

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

lenten rose: slightly hairy perennial having deep green leathery leaves and flowers that are ultimately purplish-green
hellebore: any plant of the Eurasian genus Helleborus

lenten rose (noun)	hellebore (noun)
slightly hairy perennial having deep green leathery leaves and flowers that are ultimately purplish-green	any plant of the Eurasian genus Helleborus
	perennial herbs of the lily family having thick toxic rhizomes