jock itch vs ringworm

jock itch and ringworm both are nouns.

Word	Noun	Adjective	Verb	Adverb
jock itch	Yes	No	No	No
ringworm	Yes	No	No	No

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

jock itch: fungal infection of the groin (most common in men)
ringworm: infections of the skin or nails caused by fungi and appearing as itching circular patches

Other hypernyms of jock itch include roundworm, tinea.

jock itch (noun)	ringworm (noun)
fungal infection of the groin (most common in men)	infections of the skin or nails caused by fungi and appearing as itching circular patches