sweet chestnut vs Castanea sativa

sweet chestnut and Castanea sativa both are nouns.

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

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

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

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

sweet 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