wood vs golf-club

wood and golf-club both are nouns.

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

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

wood: a golf club with a long shaft used to hit long shots; originally made with a wooden head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

Other hypernyms of wood include club, golf club, golfclub.

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a golf club with a long shaft used to hit long shots; originally made with a wooden head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