hypervitaminosis vs abnormalcy

hypervitaminosis and abnormalcy both are nouns.

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

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

hypervitaminosis: an abnormal condition resulting from taking vitamins excessively; can be serious for vitamins A or D or K
abnormalcy: an abnormal physical condition resulting from defective genes or developmental deficiencies

Other hypernyms of hypervitaminosis include abnormality.

hypervitaminosis (noun)	abnormalcy (noun)
an abnormal condition resulting from taking vitamins excessively; can be serious for vitamins A or D or K	an abnormal physical condition resulting from defective genes or developmental deficiencies