jock itch vs tinea

jock itch and tinea both are nouns.

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

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

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

Other hypernyms of jock itch include ringworm, roundworm.

jock itch (noun)	tinea (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