mazzard cherry vs Prunus avium

mazzard cherry and Prunus avium both are nouns.

Word	Noun	Adjective	Verb	Adverb
mazzard cherry	Yes	No	No	No
Prunus avium	Yes	No	No	No

As nouns, Prunus avium is a hypernym of mazzard cherry; that is, Prunus avium is a word with a broader meaning than mazzard cherry:

mazzard cherry: wild or seedling sweet cherry used as stock for grafting
Prunus avium: large Eurasian tree producing small dark bitter fruit in the wild but edible sweet fruit under cultivation

Other hypernyms of mazzard cherry include sweet cherry.

mazzard cherry (noun)	Prunus avium (noun)
wild or seedling sweet cherry used as stock for grafting	large Eurasian tree producing small dark bitter fruit in the wild but edible sweet fruit under cultivation