Joe-Pye weed vs marsh milkweed

Joe-Pye weed and marsh milkweed both are nouns.

Word	Noun	Adjective	Verb	Adverb
Joe-Pye weed	Yes	No	No	No
marsh milkweed	Yes	No	No	No

As nouns, Joe-Pye weed and marsh milkweed are synonyms defined as:

Joe-Pye weed and marsh milkweed: North American herb having whorled leaves and terminal clusters of flowers spotted with purple

Other synonyms of Joe-Pye weed include Eupatorium purpureum, purple boneset, trumpet weed.

Joe-Pye weed (noun)	marsh milkweed (noun)
North American herb having whorled leaves and terminal clusters of small pinkish or purple flower heads	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