Carya illinoensis vs pecan

Carya illinoensis and pecan both are nouns.

Word	Noun	Adjective	Verb	Adverb
Carya illinoensis	Yes	No	No	No
pecan	Yes	No	No	No

As nouns, Carya illinoensis and pecan are synonyms defined as:

Carya illinoensis and pecan: tree of southern United States and Mexico cultivated for its nuts

Other synonyms of Carya illinoensis include Carya illinoinsis, pecan tree.

Carya illinoensis (noun)	pecan (noun)
tree of southern United States and Mexico cultivated for its nuts	smooth brown oval nut of south central United States
	tree of southern United States and Mexico cultivated for its nuts
	wood of a pecan tree