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wood: a golf club with a long shaft used to hit long shots; originally made with a wooden head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	a golf club with a long shaft used to hit long shots; originally made with a wooden head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