Canada plum vs Prunus nigra

Canada plum and Prunus nigra both are nouns.

Word	Noun	Adjective	Verb	Adverb
Canada plum	Yes	No	No	No
Prunus nigra	Yes	No	No	No

As nouns, Canada plum and Prunus nigra are synonyms defined as:

Canada plum and Prunus nigra: small tree native to northeastern North America having oblong orange-red fruit

Canada plum (noun)	Prunus nigra (noun)
small tree native to northeastern North America having oblong orange-red fruit	small tree native to northeastern North America having oblong orange-red fruit