tinea unguium vs tinea

tinea unguium and tinea both are nouns.

Word	Noun	Adjective	Verb	Adverb
tinea unguium	Yes	No	No	No
tinea	Yes	No	No	No

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

tinea unguium: fungal infection of the nails (especially toenails)
tinea: infections of the skin or nails caused by fungi and appearing as itching circular patches

Other hypernyms of tinea unguium include ringworm, roundworm.

tinea unguium (noun)	tinea (noun)
fungal infection of the nails (especially toenails)	infections of the skin or nails caused by fungi and appearing as itching circular patches