tinea cruris vs jock itch

tinea cruris and jock itch both are nouns.

Word	Noun	Adjective	Verb	Adverb
tinea cruris	Yes	No	No	No
jock itch	Yes	No	No	No

As nouns, tinea cruris and jock itch are synonyms defined as:

tinea cruris and jock itch: fungal infection of the groin (most common in men)

Other synonyms of tinea cruris include eczema marginatum.

tinea cruris (noun)	jock itch (noun)
fungal infection of the groin (most common in men)	fungal infection of the groin (most common in men)