sour cherry vs Prunus cerasus

sour cherry and Prunus cerasus both are nouns.

Word	Noun	Adjective	Verb	Adverb
sour cherry	Yes	No	No	No
Prunus cerasus	Yes	No	No	No

As nouns, sour cherry and Prunus cerasus are synonyms defined as:

sour cherry and Prunus cerasus: rather small Eurasian tree producing red to black acid edible fruit

Other synonyms of sour cherry include sour cherry tree.

sour cherry (noun)	Prunus cerasus (noun)
acid cherries used for pies and preserves	rather small Eurasian tree producing red to black acid edible fruit
rather small Eurasian tree producing red to black acid edible fruit
Australian tree with sour red fruit