virology vs medical specialty

virology and medical specialty both are nouns.

Word	Noun	Adjective	Verb	Adverb
virology	Yes	No	No	No
medical specialty	Yes	No	No	No

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

virology: the branch of medical science that studies viruses and viral diseases
medical specialty: the branches of medical science that deal with nonsurgical techniques

Other hypernyms of virology include medicine.

virology (noun)	medical specialty (noun)
the branch of medical science that studies viruses and viral diseases	the branches of medical science that deal with nonsurgical techniques