hydramnios vs abnormalcy

hydramnios and abnormalcy both are nouns.

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

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

hydramnios: an abnormality of pregnancy; accumulation of excess amniotic fluid
abnormalcy: an abnormal physical condition resulting from defective genes or developmental deficiencies

Other hypernyms of hydramnios include abnormality.

hydramnios (noun)	abnormalcy (noun)
an abnormality of pregnancy; accumulation of excess amniotic fluid	an abnormal physical condition resulting from defective genes or developmental deficiencies