cow parsley vs Anthriscus sylvestris

cow parsley and Anthriscus sylvestris both are nouns.

Word	Noun	Adjective	Verb	Adverb
cow parsley	Yes	No	No	No
Anthriscus sylvestris	Yes	No	No	No

As nouns, cow parsley and Anthriscus sylvestris are synonyms defined as:

cow parsley and Anthriscus sylvestris: coarse erect biennial Old World herb introduced as a weed in eastern North America

Other synonyms of cow parsley include wild chervil.

cow parsley (noun)	Anthriscus sylvestris (noun)
coarse erect biennial Old World herb introduced as a weed in eastern North America	coarse erect biennial Old World herb introduced as a weed in eastern North America