European chestnut vs Castanea sativa

European chestnut and Castanea sativa both are nouns.

Word	Noun	Adjective	Verb	Adverb
European chestnut	Yes	No	No	No
Castanea sativa	Yes	No	No	No

As nouns, European chestnut and Castanea sativa are synonyms defined as:

European chestnut and Castanea sativa: wild or cultivated throughout southern Europe, northwestern Africa and southwestern Asia

Other synonyms of European chestnut include Spanish chestnut, sweet chestnut.

European chestnut (noun)	Castanea sativa (noun)
wild or cultivated throughout southern Europe, northwestern Africa and southwestern Asia	wild or cultivated throughout southern Europe, northwestern Africa and southwestern Asia