Castanea crenata vs Japanese chestnut

Castanea crenata and Japanese chestnut both are nouns.

Word	Noun	Adjective	Verb	Adverb
Castanea crenata	Yes	No	No	No
Japanese chestnut	Yes	No	No	No

As nouns, Castanea crenata and Japanese chestnut are synonyms defined as:

Castanea crenata and Japanese chestnut: a spreading tree of Japan that has a short trunk

Castanea crenata (noun)	Japanese chestnut (noun)
a spreading tree of Japan that has a short trunk	a spreading tree of Japan that has a short trunk