toothache tree vs Zanthoxylum fraxineum

toothache tree and Zanthoxylum fraxineum both are nouns.

Word	Noun	Adjective	Verb	Adverb
toothache tree	Yes	No	No	No
Zanthoxylum fraxineum	Yes	No	No	No

As nouns, toothache tree and Zanthoxylum fraxineum are synonyms defined as:

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

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

toothache tree (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