golf club vs golf-club

golf club and golf-club both are nouns.

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

As nouns, golf club and golf-club are synonyms defined as:

golf club and golf-club: golf equipment used by a golfer to hit a golf ball

Other synonyms of golf club include club, golfclub.

golf club (noun)	golf-club (noun)
golf equipment used by a golfer to hit a golf ball	golf equipment used by a golfer to hit a golf ball
a club of people to play golf