roundworm vs jock itch

roundworm and jock itch both are nouns.

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

As nouns, jock itch is a hyponym of roundworm; that is, jock itch is a word with a more specific, narrower meaning than roundworm:

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

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