golfer vs hooker

golfer and hooker both are nouns.

Word	Noun	Adjective	Verb	Adverb
golfer	Yes	No	No	No
hooker	Yes	No	No	No

As nouns, hooker is a hyponym of golfer; that is, hooker is a word with a more specific, narrower meaning than golfer:

golfer: someone who plays the game of golf
hooker: a golfer whose shots typically curve left (for right-handed golfers)

golfer (noun)	hooker (noun)
someone who plays the game of golf	a prostitute who attracts customers by walking the streets
	(rugby) the player in the middle of the front row of the scrum who tries to capture the ball with the foot
	a golfer whose shots typically curve left (for right-handed golfers)