Castanea vs chestnut

Castanea and chestnut both are nouns.

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

Castanea (noun)	chestnut (noun)
chestnuts; chinkapins	a dark golden-brown or reddish-brown horse
	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

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