cerebromeningitis vs cephalitis

cerebromeningitis and cephalitis both are nouns.

Word	Noun	Adjective	Verb	Adverb
cerebromeningitis	Yes	No	No	No
cephalitis	Yes	No	No	No

As nouns, cephalitis is a hypernym of cerebromeningitis; that is, cephalitis is a word with a broader meaning than cerebromeningitis:

cerebromeningitis: inflammation of the brain and spinal cord and their meninges
cephalitis: inflammation of the brain usually caused by a virus; symptoms include headache and neck pain and drowsiness and nausea and fever (`phrenitis' is no longer in scientific use)

Other hypernyms of cerebromeningitis include meningitis, encephalitis, phrenitis.

cerebromeningitis (noun)	cephalitis (noun)
inflammation of the brain and spinal cord and their meninges	inflammation of the brain usually caused by a virus; symptoms include headache and neck pain and drowsiness and nausea and fever (`phrenitis' is no longer in scientific use)