Prunus maritima vs beach plum

Prunus maritima and beach plum both are nouns.

Word	Noun	Adjective	Verb	Adverb
Prunus maritima	Yes	No	No	No
beach plum	Yes	No	No	No

As nouns, Prunus maritima and beach plum are synonyms defined as:

Prunus maritima and beach plum: seacoast shrub of northeastern North America having showy white blossoms and edible purple fruit

Other synonyms of Prunus maritima include beach plum bush.

Prunus maritima (noun)	beach plum (noun)
seacoast shrub of northeastern North America having showy white blossoms and edible purple fruit	small dark purple fruit used especially in jams and pies
	seacoast shrub of northeastern North America having showy white blossoms and edible purple fruit