marsh milkweed vs purple boneset

marsh milkweed and purple boneset both are nouns.

Word	Noun	Adjective	Verb	Adverb
marsh milkweed	Yes	No	No	No
purple boneset	Yes	No	No	No

As nouns, marsh milkweed and purple boneset are synonyms defined as:

marsh milkweed and purple boneset: North American herb having whorled leaves and terminal clusters of flowers spotted with purple

Other synonyms of marsh milkweed include Eupatorium purpureum, Joe-Pye weed, trumpet weed.

marsh milkweed (noun)	purple boneset (noun)
North American herb having whorled leaves and terminal clusters of flowers spotted with purple	North American herb having whorled leaves and terminal clusters of flowers spotted with purple