hyperbilirubinemia of the newborn vs neonatal hyperbilirubinemia

hyperbilirubinemia of the newborn and neonatal hyperbilirubinemia both are nouns.

Word	Noun	Adjective	Verb	Adverb
hyperbilirubinemia of the newborn	Yes	No	No	No
neonatal hyperbilirubinemia	Yes	No	No	No

As nouns, hyperbilirubinemia of the newborn and neonatal hyperbilirubinemia are synonyms defined as:

hyperbilirubinemia of the newborn and neonatal hyperbilirubinemia: a common disorder that is usually due to immaturity of the liver; usually subsides spontaneously

hyperbilirubinemia of the newborn (noun)	neonatal hyperbilirubinemia (noun)
a common disorder that is usually due to immaturity of the liver; usually subsides spontaneously	a common disorder that is usually due to immaturity of the liver; usually subsides spontaneously