brown hickory vs Carya glabra

brown hickory and Carya glabra both are nouns.

Word	Noun	Adjective	Verb	Adverb
brown hickory	Yes	No	No	No
Carya glabra	Yes	No	No	No

As nouns, brown hickory and Carya glabra are synonyms defined as:

brown hickory and Carya glabra: an American hickory tree having bitter nuts

Other synonyms of brown hickory include black hickory, pignut, pignut hickory.

brown hickory (noun)	Carya glabra (noun)
an American hickory tree having bitter nuts	an American hickory tree having bitter nuts