coca vs Erythroxylon coca

coca and Erythroxylon coca both are nouns.

Word	Noun	Adjective	Verb	Adverb
coca	Yes	No	No	No
Erythroxylon coca	Yes	No	No	No

As nouns, coca and Erythroxylon coca are synonyms defined as:

coca and Erythroxylon coca: a South American shrub whose leaves are chewed by natives of the Andes; a source of cocaine

Other synonyms of coca include coca plant.

coca (noun)	Erythroxylon coca (noun)
dried leaves of the coca plant (and related plants that also contain cocaine); chewed by Andean people for their stimulating effect	a South American shrub whose leaves are chewed by natives of the Andes; a source of cocaine
a South American shrub whose leaves are chewed by natives of the Andes; a source of cocaine