yellow dock vs Rumex obtusifolius

yellow dock and Rumex obtusifolius both are nouns.

Word	Noun	Adjective	Verb	Adverb
yellow dock	Yes	No	No	No
Rumex obtusifolius	Yes	No	No	No

As nouns, yellow dock and Rumex obtusifolius are synonyms defined as:

yellow dock and Rumex obtusifolius: European dock with broad obtuse leaves and bitter rootstock common as a weed in North America

Other synonyms of yellow dock include bitter dock, broad-leaved dock.

yellow dock (noun)	Rumex obtusifolius (noun)
European dock with broad obtuse leaves and bitter rootstock common as a weed in North America	European dock with broad obtuse leaves and bitter rootstock common as a weed in North America