rattlesnake root vs Prenanthes purpurea

rattlesnake root and Prenanthes purpurea both are nouns.

Word	Noun	Adjective	Verb	Adverb
rattlesnake root	Yes	No	No	No
Prenanthes purpurea	Yes	No	No	No

As nouns, rattlesnake root and Prenanthes purpurea are synonyms defined as:

rattlesnake root and Prenanthes purpurea: herb of central and southern Europe having purple florets

rattlesnake root (noun)	Prenanthes purpurea (noun)
herb of central and southern Europe having purple florets	herb of central and southern Europe having purple florets
a plant of the genus Nabalus