athlete's foot vs ringworm

athlete's foot and ringworm both are nouns.

Word	Noun	Adjective	Verb	Adverb
athlete's foot	Yes	No	No	No
ringworm	Yes	No	No	No

As nouns, ringworm is a hypernym of athlete's foot; that is, ringworm is a word with a broader meaning than athlete's foot:

athlete's foot: fungal infection of the feet
ringworm: infections of the skin or nails caused by fungi and appearing as itching circular patches

Other hypernyms of athlete's foot include roundworm, tinea.

athlete's foot (noun)	ringworm (noun)
fungal infection of the feet	infections of the skin or nails caused by fungi and appearing as itching circular patches