sloe vs wild plum tree

sloe and wild plum tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
sloe	Yes	No	No	No
wild plum tree	Yes	No	No	No

As nouns, wild plum tree is a hypernym of sloe; that is, wild plum tree is a word with a broader meaning than sloe:

sloe: wild plum of northeastern United States having dark purple fruits with yellow flesh
wild plum tree: an uncultivated plum tree or shrub

Other hypernyms of sloe include wild plum.

sloe (noun)	wild plum tree (noun)
small sour dark purple fruit of especially the Allegheny plum bush	an uncultivated plum tree or shrub
a thorny Eurasian bush with plumlike fruits
wild plum of northeastern United States having dark purple fruits with yellow flesh