common European ash vs Fraxinus excelsior

common European ash and Fraxinus excelsior both are nouns.

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

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

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

Other synonyms of common European ash include European ash.

common European ash (noun)	Fraxinus excelsior (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