golf club vs wood

golf club and wood both are nouns.

Word	Noun	Adjective	Verb	Adverb
golf club	Yes	No	No	No
wood	Yes	No	No	No

As nouns, wood is a hyponym of golf club; that is, wood is a word with a more specific, narrower meaning than golf club:

golf club: golf equipment used by a golfer to hit a golf ball
wood: a golf club with a long shaft used to hit long shots; originally made with a wooden head

Other hyponyms of golf club include iron.

golf club (noun)	wood (noun)
golf equipment used by a golfer to hit a golf ball	any wind instrument other than the brass instruments
a club of people to play golf	a golf club with a long shaft used to hit long shots; originally made with a wooden head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