Carya tomentosa vs hickory

Carya tomentosa and hickory both are nouns.

Word	Noun	Adjective	Verb	Adverb
Carya tomentosa	Yes	No	No	No
hickory	Yes	No	No	No

As nouns, hickory is a hypernym of Carya tomentosa; that is, hickory is a word with a broader meaning than Carya tomentosa:

Carya tomentosa: smooth-barked North American hickory with 7 to 9 leaflets bearing a hard-shelled edible nut
hickory: American hardwood tree bearing edible nuts

Other hypernyms of Carya tomentosa include hickory tree.

Carya tomentosa (noun)	hickory (noun)
smooth-barked North American hickory with 7 to 9 leaflets bearing a hard-shelled edible nut	American hardwood tree bearing edible nuts
	valuable tough heavy hardwood from various hickory trees