ringworm vs mycosis

ringworm and mycosis both are nouns.

Word	Noun	Adjective	Verb	Adverb
ringworm	Yes	No	No	No
mycosis	Yes	No	No	No

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

ringworm: infections of the skin or nails caused by fungi and appearing as itching circular patches
mycosis: an inflammatory condition caused by a fungus

Other hypernyms of ringworm include fungal infection.

ringworm (noun)	mycosis (noun)
infections of the skin or nails caused by fungi and appearing as itching circular patches	an inflammatory condition caused by a fungus