retroversion vs abnormalcy

retroversion and abnormalcy both are nouns.

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

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

retroversion: a turning or tilting backward of an organ or body part
abnormalcy: an abnormal physical condition resulting from defective genes or developmental deficiencies

Other hypernyms of retroversion include abnormality.

retroversion (noun)	abnormalcy (noun)
returning to a former state	an abnormal physical condition resulting from defective genes or developmental deficiencies
translation back into the original language
a turning or tilting backward of an organ or body part