pecan vs wood

pecan and wood both are nouns.

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

As nouns, wood is a hypernym of pecan; that is, wood is a word with a broader meaning than pecan:

pecan (noun)	wood (noun)
smooth brown oval nut of south central United States	any wind instrument other than the brass instruments
tree of southern United States and Mexico cultivated for its nuts	a golf club with a long shaft used to hit long shots; originally made with a wooden head
wood of a pecan tree	the trees and other plants in a large densely wooded area
	the hard fibrous lignified substance under the bark of trees