wryneck vs abnormalcy

wryneck and abnormalcy both are nouns.

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

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

wryneck: an unnatural condition in which the head leans to one side because the neck muscles on that side are contracted
abnormalcy: an abnormal physical condition resulting from defective genes or developmental deficiencies

Other hypernyms of wryneck include abnormality.

wryneck (noun)	abnormalcy (noun)
Old World woodpecker with a peculiar habit of twisting the neck	an abnormal physical condition resulting from defective genes or developmental deficiencies
an unnatural condition in which the head leans to one side because the neck muscles on that side are contracted