gammopathy vs pathology

gammopathy and pathology both are nouns.

Word	Noun	Adjective	Verb	Adverb
gammopathy	Yes	No	No	No
pathology	Yes	No	No	No

As nouns, pathology is a hypernym of gammopathy; that is, pathology is a word with a broader meaning than gammopathy:

gammopathy: a disturbance in the synthesis of immunoglobulins; proteins having antibody activity increase greatly in the blood
pathology: any deviation from a healthy or normal condition

gammopathy (noun)	pathology (noun)
a disturbance in the synthesis of immunoglobulins; proteins having antibody activity increase greatly in the blood	the branch of medical science that studies the causes and nature and effects of diseases
	any deviation from a healthy or normal condition