sloe vs blackthorn

sloe and blackthorn both are nouns.

Word	Noun	Adjective	Verb	Adverb
sloe	Yes	No	No	No
blackthorn	Yes	No	No	No

As nouns, sloe and blackthorn are synonyms defined as:

Other synonyms of sloe include Prunus spinosa.

sloe (noun)	blackthorn (noun)
small sour dark purple fruit of especially the Allegheny plum bush	erect and almost thornless American hawthorn with somewhat pear-shaped berries
a thorny Eurasian bush with plumlike fruits	a thorny Eurasian bush with plumlike fruits
wild plum of northeastern United States having dark purple fruits with yellow flesh