bearberry vs cascara buckthorn

bearberry and cascara buckthorn both are nouns.

Word	Noun	Adjective	Verb	Adverb
bearberry	Yes	No	No	No
cascara buckthorn	Yes	No	No	No

As nouns, bearberry and cascara buckthorn are synonyms defined as:

bearberry and cascara buckthorn: shrubby tree of the Pacific coast of the United States; yields cascara sagrada

Other synonyms of bearberry include bearwood, chittamwood, chittimwood, Rhamnus purshianus.

bearberry (noun)	cascara buckthorn (noun)
chiefly evergreen subshrubs of northern to Arctic areas	shrubby tree of the Pacific coast of the United States; yields cascara sagrada
deciduous shrub of southeastern and central United States
shrubby tree of the Pacific coast of the United States; yields cascara sagrada