Rhamnus californicus vs coffeeberry

Rhamnus californicus and coffeeberry both are nouns.

Word	Noun	Adjective	Verb	Adverb
Rhamnus californicus	Yes	No	No	No
coffeeberry	Yes	No	No	No

As nouns, Rhamnus californicus and coffeeberry are synonyms defined as:

Rhamnus californicus and coffeeberry: evergreen shrub of western United States bearing small red or black fruits

Other synonyms of Rhamnus californicus include California buckthorn, California coffee.

Rhamnus californicus (noun)	coffeeberry (noun)
evergreen shrub of western United States bearing small red or black fruits	evergreen shrub of western United States bearing small red or black fruits