common comfrey vs Symphytum officinale

common comfrey and Symphytum officinale both are nouns.

Word	Noun	Adjective	Verb	Adverb
common comfrey	Yes	No	No	No
Symphytum officinale	Yes	No	No	No

As nouns, common comfrey and Symphytum officinale are synonyms defined as:

common comfrey and Symphytum officinale: European herb having small white, pink or purple flowers; naturalized as a weed in North America

Other synonyms of common comfrey include boneset.

common comfrey (noun)	Symphytum officinale (noun)
European herb having small white, pink or purple flowers; naturalized as a weed in North America	European herb having small white, pink or purple flowers; naturalized as a weed in North America