tinea cruris vs roundworm

tinea cruris and roundworm both are nouns.

Word	Noun	Adjective	Verb	Adverb
tinea cruris	Yes	No	No	No
roundworm	Yes	No	No	No

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

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

Other hypernyms of tinea cruris include ringworm, tinea.

tinea cruris (noun)	roundworm (noun)
fungal infection of the groin (most common in men)	unsegmented worms with elongated rounded body pointed at both ends; mostly free-living but some are parasitic
	infections of the skin or nails caused by fungi and appearing as itching circular patches