boneset vs common comfrey

boneset and common comfrey both are nouns.

Word	Noun	Adjective	Verb	Adverb
boneset	Yes	No	No	No
common comfrey	Yes	No	No	No

As nouns, boneset and common comfrey are synonyms defined as:

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

Other synonyms of boneset include Symphytum officinale.

boneset (noun)	common comfrey (noun)
perennial herb of southeastern United States having white-rayed flower heads; formerly used as in folk medicine	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