chittamwood vs Rhamnus purshianus

chittamwood and Rhamnus purshianus both are nouns.

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

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

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

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

chittamwood (noun)	Rhamnus purshianus (noun)
deciduous tree of southeastern United States and Mexico	shrubby tree of the Pacific coast of the United States; yields cascara sagrada
shrubby tree of the Pacific coast of the United States; yields cascara sagrada
shrubby tree of southern United States having large plumes of feathery flowers resembling puffs of smoke