pecan tree vs pecan

pecan tree and pecan both are nouns.

Word	Noun	Adjective	Verb	Adverb
pecan tree	Yes	No	No	No
pecan	Yes	No	No	No

As nouns, pecan tree and pecan are synonyms defined as:

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

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

pecan tree (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