Culver's physic vs Veronicastrum virginicum

Culver's physic and Veronicastrum virginicum both are nouns.

Word	Noun	Adjective	Verb	Adverb
Culver's physic	Yes	No	No	No
Veronicastrum virginicum	Yes	No	No	No

As nouns, Culver's physic and Veronicastrum virginicum are synonyms defined as:

Culver's physic and Veronicastrum virginicum: a tall perennial herb having spikes of small white or purple flowers; common in eastern North America

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

Culver's physic (noun)	Veronicastrum virginicum (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