Prunus subcordata vs Sierra plum

Prunus subcordata and Sierra plum both are nouns.

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

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

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

Other synonyms of Prunus subcordata include Pacific plum.

Prunus subcordata (noun)	Sierra plum (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