otitis vs labyrinthitis

otitis and labyrinthitis both are nouns.

Word	Noun	Adjective	Verb	Adverb
otitis	Yes	No	No	No
labyrinthitis	Yes	No	No	No

As nouns, labyrinthitis is a hyponym of otitis; that is, labyrinthitis is a word with a more specific, narrower meaning than otitis:

otitis: inflammation of the ear
labyrinthitis: inflammation of the inner ear; can cause vertigo and vomiting

Other hyponyms of otitis include otitis interna, otitis externa, otitis media.

otitis (noun)	labyrinthitis (noun)
inflammation of the ear	inflammation of the inner ear; can cause vertigo and vomiting