holly-leaf cherry vs wild plum

holly-leaf cherry and wild plum both are nouns.

Word	Noun	Adjective	Verb	Adverb
holly-leaf cherry	Yes	No	No	No
wild plum	Yes	No	No	No

As nouns, wild plum is a hypernym of holly-leaf cherry; that is, wild plum is a word with a broader meaning than holly-leaf cherry:

holly-leaf cherry: California evergreen wild plum with spiny leathery leaves and white flowers
wild plum: an uncultivated plum tree or shrub

Other hypernyms of holly-leaf cherry include wild plum tree.

holly-leaf cherry (noun)	wild plum (noun)
California evergreen wild plum with spiny leathery leaves and white flowers	fruit of the wild plum of southern United States
	an uncultivated plum tree or shrub