sour cherry vs sour cherry tree

sour cherry and sour cherry tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
sour cherry	Yes	No	No	No
sour cherry tree	Yes	No	No	No

As nouns, sour cherry and sour cherry tree are synonyms defined as:

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

Other synonyms of sour cherry include Prunus cerasus.

sour cherry (noun)	sour cherry tree (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