neurology vs medical science

neurology and medical science both are nouns.

Word	Noun	Adjective	Verb	Adverb
neurology	Yes	No	No	No
medical science	Yes	No	No	No

As nouns, medical science is a hypernym of neurology; that is, medical science is a word with a broader meaning than neurology:

neurology: the branch of medical science that deals with the nervous system
medical science: the science of dealing with the maintenance of health and the prevention and treatment of disease

neurology (noun)	medical science (noun)
the branch of medical science that deals with the nervous system	the science of dealing with the maintenance of health and the prevention and treatment of disease
(neurology) the branch of medicine that deals with the nervous system and its disorders