black hickory vs mockernut

black hickory and mockernut both are nouns.

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

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

black hickory and mockernut: 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 hickory, white-heart hickory.

black hickory (noun)	mockernut (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