European barberry vs Berberis vulgaris

European barberry and Berberis vulgaris both are nouns.

Word	Noun	Adjective	Verb	Adverb
European barberry	Yes	No	No	No
Berberis vulgaris	Yes	No	No	No

As nouns, European barberry and Berberis vulgaris are synonyms defined as:

European barberry and Berberis vulgaris: upright deciduous European shrub widely naturalized in United States having clusters of juicy berries

Other synonyms of European barberry include common barberry.

European barberry (noun)	Berberis vulgaris (noun)
upright deciduous European shrub widely naturalized in United States having clusters of juicy berries	upright deciduous European shrub widely naturalized in United States having clusters of juicy berries