lenten rose vs black hellebore

lenten rose and black hellebore both are nouns.

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

As nouns, lenten rose and black hellebore are synonyms defined as:

lenten rose and black hellebore: slightly hairy perennial having deep green leathery leaves and flowers that are ultimately purplish-green

Other synonyms of lenten rose include Helleborus orientalis.

lenten rose (noun)	black hellebore (noun)
slightly hairy perennial having deep green leathery leaves and flowers that are ultimately purplish-green	European evergreen plant with white or purplish rose-like winter-blooming flowers
	slightly hairy perennial having deep green leathery leaves and flowers that are ultimately purplish-green