toothache tree vs sea ash

toothache tree and sea ash both are nouns.

Word	Noun	Adjective	Verb	Adverb
toothache tree	Yes	No	No	No
sea ash	Yes	No	No	No

As nouns, toothache tree and sea ash are synonyms defined as:

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

Other synonyms of toothache tree include Zanthoxylum americanum, Zanthoxylum fraxineum.

toothache tree (noun)	sea ash (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