Joe-Pye weed vs Eupatorium purpureum

Joe-Pye weed and Eupatorium purpureum both are nouns.

Word	Noun	Adjective	Verb	Adverb
Joe-Pye weed	Yes	No	No	No
Eupatorium purpureum	Yes	No	No	No

As nouns, Joe-Pye weed and Eupatorium purpureum are synonyms defined as:

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

Other synonyms of Joe-Pye weed include marsh milkweed, purple boneset, trumpet weed.

Joe-Pye weed (noun)	Eupatorium purpureum (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