black hickory vs mockernut hickory

black hickory and mockernut hickory both are nouns.

Word	Noun	Adjective	Verb	Adverb
black hickory	Yes	No	No	No
mockernut hickory	Yes	No	No	No

As nouns, black hickory and mockernut hickory are synonyms defined as:

black hickory and mockernut hickory: smooth-barked North American hickory with 7 to 9 leaflets bearing a hard-shelled edible nut

Other synonyms of black hickory include big-bud hickory, Carya tomentosa, mockernut, white-heart hickory.

black hickory (noun)	mockernut hickory (noun)
an American hickory tree having bitter nuts	smooth-barked North American hickory with 7 to 9 leaflets bearing a hard-shelled edible nut
smooth-barked North American hickory with 7 to 9 leaflets bearing a hard-shelled edible nut
North American walnut tree with hard dark wood and edible nut