Juglans nigra vs black walnut tree

Juglans nigra and black walnut tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
Juglans nigra	Yes	No	No	No
black walnut tree	Yes	No	No	No

As nouns, Juglans nigra and black walnut tree are synonyms defined as:

Juglans nigra and black walnut tree: North American walnut tree with hard dark wood and edible nut

Other synonyms of Juglans nigra include black hickory, black walnut.

Juglans nigra (noun)	black walnut tree (noun)
North American walnut tree with hard dark wood and edible nut	North American walnut tree with hard dark wood and edible nut