abnormal vs abnormality

abnormal is not a noun while abnormality is a noun.

Word	Noun	Adjective	Verb	Adverb
abnormal	No	Yes	No	No
abnormality	Yes	No	No	No

abnormal (noun)	abnormality (noun)
	behavior that breaches the rule or etiquette or custom or morality
	marked strangeness as a consequence of being abnormal
	retardation sufficient to fall outside the normal range of intelligence
	an abnormal physical condition resulting from defective genes or developmental deficiencies

abnormal (adjective)	abnormality (adjective)
not normal; not typical or usual or regular or conforming to a norm
departing from the normal in e.g. intelligence and development
much greater than the normal