club head vs clubhead

club head and clubhead both are nouns.

Word	Noun	Adjective	Verb	Adverb
club head	Yes	No	No	No
clubhead	Yes	No	No	No

As nouns, club head and clubhead are synonyms defined as:

club head and clubhead: (golf) the head of the club which strikes the ball

Other synonyms of club head include club-head, golf-club head.

club head (noun)	clubhead (noun)
(golf) the head of the club which strikes the ball	(golf) the head of the club which strikes the ball