chestnut vs Castanea

chestnut and Castanea both are nouns.

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

chestnut (noun)	Castanea (noun)
a dark golden-brown or reddish-brown horse	chestnuts; chinkapins
a small horny callus on the inner surface of a horse's leg
the brown color of chestnuts
edible nut of any of various chestnut trees of the genus Castanea
any of several attractive deciduous trees yellow-brown in autumn; yield a hard wood and edible nuts in a prickly bur
wood of any of various chestnut trees of the genus Castanea

chestnut (adjective)	Castanea (adjective)
(of hair or feathers) of a golden brown to reddish brown color