swinger vs jock

swinger and jock both are nouns.

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

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

Other hypernyms of swinger include athlete.

swinger (noun)	jock (noun)
a person who engages freely in promiscuous sex	a support for the genitals worn by men engaging in strenuous exercise
someone who swings sports implements	a person trained to compete in sports