Carya glabra vs pignut hickory

Carya glabra and pignut hickory both are nouns.

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

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

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

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

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