immunology vs medical specialty

immunology and medical specialty both are nouns.

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

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

immunology: the branch of medical science that studies the body's immune system
medical specialty: the branches of medical science that deal with nonsurgical techniques

Other hypernyms of immunology include medicine.

immunology (noun)	medical specialty (noun)
the branch of medical science that studies the body's immune system	the branches of medical science that deal with nonsurgical techniques