Prunus avium vs oxheart

Prunus avium and oxheart both are nouns.

Word	Noun	Adjective	Verb	Adverb
Prunus avium	Yes	No	No	No
oxheart	Yes	No	No	No

As nouns, oxheart is a hyponym of Prunus avium; that is, oxheart is a word with a more specific, narrower meaning than Prunus avium:

Prunus avium: large Eurasian tree producing small dark bitter fruit in the wild but edible sweet fruit under cultivation
oxheart: any of several cultivated sweet cherries having sweet juicy heart-shaped fruits

Other hyponyms of Prunus avium include heart cherry, oxheart cherry, gean, mazzard, mazzard cherry.

Prunus avium (noun)	oxheart (noun)
large Eurasian tree producing small dark bitter fruit in the wild but edible sweet fruit under cultivation	large heart-shaped sweet cherry with soft flesh
	any of several cultivated sweet cherries having sweet juicy heart-shaped fruits