whorlywort vs Culver's root

whorlywort and Culver's root both are nouns.

Word	Noun	Adjective	Verb	Adverb
whorlywort	Yes	No	No	No
Culver's root	Yes	No	No	No

As nouns, whorlywort and Culver's root are synonyms defined as:

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

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

whorlywort (noun)	Culver's 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