California coffee vs California buckthorn

California coffee and California buckthorn both are nouns.

Word	Noun	Adjective	Verb	Adverb
California coffee	Yes	No	No	No
California buckthorn	Yes	No	No	No

As nouns, California coffee and California buckthorn are synonyms defined as:

California coffee and California buckthorn: evergreen shrub of western United States bearing small red or black fruits

Other synonyms of California coffee include coffeeberry, Rhamnus californicus.

California coffee (noun)	California buckthorn (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