Oregon grape vs Mahonia nervosa

Oregon grape and Mahonia nervosa both are nouns.

Word	Noun	Adjective	Verb	Adverb
Oregon grape	Yes	No	No	No
Mahonia nervosa	Yes	No	No	No

As nouns, Oregon grape and Mahonia nervosa are synonyms defined as:

Oregon grape and Mahonia nervosa: small shrub with grey-green leaves and yellow flowers followed by glaucous blue berries

Oregon grape (noun)	Mahonia nervosa (noun)
ornamental evergreen shrub of Pacific coast of North America having dark green pinnate leaves and racemes of yellow flowers followed by blue-black berries	small shrub with grey-green leaves and yellow flowers followed by glaucous blue berries
small shrub with grey-green leaves and yellow flowers followed by glaucous blue berries