serology vs medical science

serology and medical science both are nouns.

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

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

serology: the branch of medical science that deals with serums; especially with blood serums and disease
medical science: the science of dealing with the maintenance of health and the prevention and treatment of disease

serology (noun)	medical science (noun)
the branch of medical science that deals with serums; especially with blood serums and disease	the science of dealing with the maintenance of health and the prevention and treatment of disease