European hackberry vs Celtis australis

European hackberry and Celtis australis both are nouns.

Word	Noun	Adjective	Verb	Adverb
European hackberry	Yes	No	No	No
Celtis australis	Yes	No	No	No

As nouns, European hackberry and Celtis australis are synonyms defined as:

European hackberry and Celtis australis: bright green deciduous shade tree of southern Europe

Other synonyms of European hackberry include Mediterranean hackberry.

European hackberry (noun)	Celtis australis (noun)
bright green deciduous shade tree of southern Europe	bright green deciduous shade tree of southern Europe