Veronicastrum virginicum vs Culvers root

Veronicastrum virginicum and Culvers root both are nouns.

Word	Noun	Adjective	Verb	Adverb
Veronicastrum virginicum	Yes	No	No	No
Culvers root	Yes	No	No	No

As nouns, Veronicastrum virginicum and Culvers root are synonyms defined as:

Veronicastrum virginicum and Culvers root: a tall perennial herb having spikes of small white or purple flowers; common in eastern North America

Other synonyms of Veronicastrum virginicum include Culver's physic, Culver's root, Culvers physic, whorlywort.

Veronicastrum virginicum (noun)	Culvers root (noun)
a tall perennial herb having spikes of small white or purple flowers; common in eastern North America	a tall perennial herb having spikes of small white or purple flowers; common in eastern North America