sweet chestnut vs Spanish chestnut

sweet chestnut and Spanish chestnut both are nouns.

Word	Noun	Adjective	Verb	Adverb
sweet chestnut	Yes	No	No	No
Spanish chestnut	Yes	No	No	No

As nouns, sweet chestnut and Spanish chestnut are synonyms defined as:

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

Other synonyms of sweet chestnut include Castanea sativa, European chestnut.

sweet chestnut (noun)	Spanish chestnut (noun)
wild or cultivated throughout southern Europe, northwestern Africa and southwestern Asia	wild or cultivated throughout southern Europe, northwestern Africa and southwestern Asia