obliquity vs abnormalcy

obliquity and abnormalcy both are nouns.

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

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

obliquity: the presentation during labor of the head of the fetus at an abnormal angle
abnormalcy: an abnormal physical condition resulting from defective genes or developmental deficiencies

Other hypernyms of obliquity include abnormality.

obliquity (noun)	abnormalcy (noun)
the quality of being deceptive	an abnormal physical condition resulting from defective genes or developmental deficiencies
the presentation during labor of the head of the fetus at an abnormal angle