Carya illinoinsis vs pecan

Carya illinoinsis and pecan both are nouns.

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

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

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

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

Carya illinoinsis (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