poliomyelitis vs infantile paralysis

poliomyelitis and infantile paralysis both are nouns.

Word	Noun	Adjective	Verb	Adverb
poliomyelitis	Yes	No	No	No
infantile paralysis	Yes	No	No	No

As nouns, poliomyelitis and infantile paralysis are synonyms defined as:

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

Other synonyms of poliomyelitis include acute anterior poliomyelitis, polio.

poliomyelitis (noun)	infantile paralysis (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