hooker vs jock

hooker and jock both are nouns.

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

As nouns, jock is a hypernym of hooker; that is, jock is a word with a broader meaning than hooker:

hooker: (rugby) the player in the middle of the front row of the scrum who tries to capture the ball with the foot
jock: a person trained to compete in sports

Other hypernyms of hooker include athlete.

hooker (noun)	jock (noun)
a prostitute who attracts customers by walking the streets	a support for the genitals worn by men engaging in strenuous exercise
(rugby) the player in the middle of the front row of the scrum who tries to capture the ball with the foot	a person trained to compete in sports
a golfer whose shots typically curve left (for right-handed golfers)