Veratrum viride vs hellebore

Veratrum viride and hellebore both are nouns.

Word	Noun	Adjective	Verb	Adverb
Veratrum viride	Yes	No	No	No
hellebore	Yes	No	No	No

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

Veratrum viride: North American plant having large leaves and yellowish green flowers growing in racemes; yields a toxic alkaloid used medicinally
hellebore: perennial herbs of the lily family having thick toxic rhizomes

Other hypernyms of Veratrum viride include false hellebore.

Veratrum viride (noun)	hellebore (noun)
North American plant having large leaves and yellowish green flowers growing in racemes; yields a toxic alkaloid used medicinally	any plant of the Eurasian genus Helleborus
	perennial herbs of the lily family having thick toxic rhizomes