Berberis thunbergii vs Japanese barberry

Berberis thunbergii and Japanese barberry both are nouns.

Word	Noun	Adjective	Verb	Adverb
Berberis thunbergii	Yes	No	No	No
Japanese barberry	Yes	No	No	No

As nouns, Berberis thunbergii and Japanese barberry are synonyms defined as:

Berberis thunbergii and Japanese barberry: compact deciduous shrub having persistent red berries; widespread in cultivation especially for hedges

Berberis thunbergii (noun)	Japanese barberry (noun)
compact deciduous shrub having persistent red berries; widespread in cultivation especially for hedges	compact deciduous shrub having persistent red berries; widespread in cultivation especially for hedges