bearberry vs Rhamnus purshianus

bearberry and Rhamnus purshianus both are nouns.

Word	Noun	Adjective	Verb	Adverb
bearberry	Yes	No	No	No
Rhamnus purshianus	Yes	No	No	No

As nouns, bearberry and Rhamnus purshianus are synonyms defined as:

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

Other synonyms of bearberry include bearwood, cascara buckthorn, chittamwood, chittimwood.

bearberry (noun)	Rhamnus purshianus (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