sweet cherry vs black cherry

sweet cherry and black cherry both are nouns.

Word	Noun	Adjective	Verb	Adverb
sweet cherry	Yes	No	No	No
black cherry	Yes	No	No	No

As nouns, sweet cherry and black cherry are synonyms defined as:

sweet cherry and black cherry: any of several fruits of cultivated cherry trees that have sweet flesh

sweet cherry (noun)	black cherry (noun)
any of several fruits of cultivated cherry trees that have sweet flesh	any of several fruits of cultivated cherry trees that have sweet flesh
large Eurasian tree producing small dark bitter fruit in the wild but edible sweet fruit under cultivation	large North American wild cherry with round black sour edible fruit