Symphytum officinale vs common comfrey

Symphytum officinale and common comfrey both are nouns.

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

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

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

Other synonyms of Symphytum officinale include boneset.

Symphytum officinale (noun)	common comfrey (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