brachydactyly vs abnormalcy

brachydactyly and abnormalcy both are nouns.

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

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

brachydactyly: abnormal shortness of fingers and toes
abnormalcy: an abnormal physical condition resulting from defective genes or developmental deficiencies

Other hypernyms of brachydactyly include abnormality.

brachydactyly (noun)	abnormalcy (noun)
abnormal shortness of fingers and toes	an abnormal physical condition resulting from defective genes or developmental deficiencies