yellowwood vs wood

yellowwood and wood both are nouns.

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

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

yellowwood (noun)	wood (noun)
any of various trees having yellowish wood or yielding a yellow extract	any wind instrument other than the brass instruments
the yellow wood of any of various yellowwood trees	a golf club with a long shaft used to hit long shots; originally made with a wooden head
	the trees and other plants in a large densely wooded area
	the hard fibrous lignified substance under the bark of trees