Zanthoxylum americanum vs Zanthoxylum fraxineum

Zanthoxylum americanum and Zanthoxylum fraxineum both are nouns.

Word	Noun	Adjective	Verb	Adverb
Zanthoxylum americanum	Yes	No	No	No
Zanthoxylum fraxineum	Yes	No	No	No

As nouns, Zanthoxylum americanum and Zanthoxylum fraxineum are synonyms defined as:

Zanthoxylum americanum and Zanthoxylum fraxineum: small deciduous aromatic shrub (or tree) having spiny branches and yellowish flowers; eastern North America

Other synonyms of Zanthoxylum americanum include sea ash, toothache tree.

Zanthoxylum americanum (noun)	Zanthoxylum fraxineum (noun)
small deciduous aromatic shrub (or tree) having spiny branches and yellowish flowers; eastern North America	small deciduous aromatic shrub (or tree) having spiny branches and yellowish flowers; eastern North America