Berberis vulgaris vs common barberry

Berberis vulgaris and common barberry both are nouns.

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

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

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

Other synonyms of Berberis vulgaris include European barberry.

Berberis vulgaris (noun)	common barberry (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