Prunus mexicana vs big-tree plum

Prunus mexicana and big-tree plum both are nouns.

Word	Noun	Adjective	Verb	Adverb
Prunus mexicana	Yes	No	No	No
big-tree plum	Yes	No	No	No

As nouns, Prunus mexicana and big-tree plum are synonyms defined as:

Prunus mexicana and big-tree plum: small tree of southwestern United States having purplish-red fruit sometimes cultivated as an ornamental for its large leaves

Prunus mexicana (noun)	big-tree plum (noun)
small tree of southwestern United States having purplish-red fruit sometimes cultivated as an ornamental for its large leaves	small tree of southwestern United States having purplish-red fruit sometimes cultivated as an ornamental for its large leaves