genus Eugenia vs sour cherry

genus Eugenia and sour cherry both are nouns.

Word	Noun	Adjective	Verb	Adverb
genus Eugenia	Yes	No	No	No
sour cherry	Yes	No	No	No

genus Eugenia (noun)	sour cherry (noun)
tropical trees and shrubs with aromatic leaves and often valuable hard wood	acid cherries used for pies and preserves
	rather small Eurasian tree producing red to black acid edible fruit
	Australian tree with sour red fruit