Fraxinus excelsior vs common European ash

Fraxinus excelsior and common European ash both are nouns.

Word	Noun	Adjective	Verb	Adverb
Fraxinus excelsior	Yes	No	No	No
common European ash	Yes	No	No	No

As nouns, Fraxinus excelsior and common European ash are synonyms defined as:

Fraxinus excelsior and common European ash: tall ash of Europe to the Caucasus having leaves shiny dark-green above and pale downy beneath

Other synonyms of Fraxinus excelsior include European ash.

Fraxinus excelsior (noun)	common European ash (noun)
tall ash of Europe to the Caucasus having leaves shiny dark-green above and pale downy beneath	tall ash of Europe to the Caucasus having leaves shiny dark-green above and pale downy beneath