Sierra plum vs Prunus subcordata

Sierra plum and Prunus subcordata both are nouns.

Word	Noun	Adjective	Verb	Adverb
Sierra plum	Yes	No	No	No
Prunus subcordata	Yes	No	No	No

As nouns, Sierra plum and Prunus subcordata are synonyms defined as:

Sierra plum and Prunus subcordata: shrub of the Pacific coast of the United States bearing small red insipid fruit

Other synonyms of Sierra plum include Pacific plum.

Sierra plum (noun)	Prunus subcordata (noun)
shrub of the Pacific coast of the United States bearing small red insipid fruit	shrub of the Pacific coast of the United States bearing small red insipid fruit