Petasites hybridus vs butterbur

Petasites hybridus and butterbur both are nouns.

Word	Noun	Adjective	Verb	Adverb
Petasites hybridus	Yes	No	No	No
butterbur	Yes	No	No	No

As nouns, Petasites hybridus and butterbur are synonyms defined as:

Petasites hybridus and butterbur: small Eurasian herb having broad leaves and lilac-pink rayless flowers; found in moist areas

Other synonyms of Petasites hybridus include bog rhubarb, Petasites vulgaris.

Petasites hybridus (noun)	butterbur (noun)
small Eurasian herb having broad leaves and lilac-pink rayless flowers; found in moist areas	small Eurasian herb having broad leaves and lilac-pink rayless flowers; found in moist areas