poliomyelitis vs acute anterior poliomyelitis

poliomyelitis and acute anterior poliomyelitis both are nouns.

Word	Noun	Adjective	Verb	Adverb
poliomyelitis	Yes	No	No	No
acute anterior poliomyelitis	Yes	No	No	No

As nouns, poliomyelitis and acute anterior poliomyelitis are synonyms defined as:

poliomyelitis and acute anterior poliomyelitis: an acute viral disease marked by inflammation of nerve cells of the brain stem and spinal cord

Other synonyms of poliomyelitis include infantile paralysis, polio.

poliomyelitis (noun)	acute anterior poliomyelitis (noun)
an acute viral disease marked by inflammation of nerve cells of the brain stem and spinal cord	an acute viral disease marked by inflammation of nerve cells of the brain stem and spinal cord