hepatomegaly vs abnormalcy

hepatomegaly and abnormalcy both are nouns.

Word	Noun	Adjective	Verb	Adverb
hepatomegaly	Yes	No	No	No
abnormalcy	Yes	No	No	No

As nouns, abnormalcy is a hypernym of hepatomegaly; that is, abnormalcy is a word with a broader meaning than hepatomegaly:

hepatomegaly: abnormal enlargement of the liver
abnormalcy: an abnormal physical condition resulting from defective genes or developmental deficiencies

Other hypernyms of hepatomegaly include abnormality.

hepatomegaly (noun)	abnormalcy (noun)
abnormal enlargement of the liver	an abnormal physical condition resulting from defective genes or developmental deficiencies