barber's itch vs ringworm

barber's itch and ringworm both are nouns.

Word	Noun	Adjective	Verb	Adverb
barber's itch	Yes	No	No	No
ringworm	Yes	No	No	No

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

barber's itch: fungal infection of the face and neck
ringworm: infections of the skin or nails caused by fungi and appearing as itching circular patches

Other hypernyms of barber's itch include roundworm, tinea.

barber's itch (noun)	ringworm (noun)
fungal infection of the face and neck	infections of the skin or nails caused by fungi and appearing as itching circular patches