Erythroxylon vs Erythroxylum

Erythroxylon and Erythroxylum both are nouns.

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

As nouns, Erythroxylon and Erythroxylum are synonyms defined as:

Erythroxylon and Erythroxylum: a large genus of South American shrubs and small trees of the family Erythroxylaceae

Other synonyms of Erythroxylon include genus Erythroxylon, genus Erythroxylum.

Erythroxylon (noun)	Erythroxylum (noun)
a large genus of South American shrubs and small trees of the family Erythroxylaceae	a large genus of South American shrubs and small trees of the family Erythroxylaceae