congenital defect vs congenital abnormality

congenital defect and congenital abnormality both are nouns.

Word	Noun	Adjective	Verb	Adverb
congenital defect	Yes	No	No	No
congenital abnormality	Yes	No	No	No

As nouns, congenital defect and congenital abnormality are synonyms defined as:

congenital defect and congenital abnormality: a defect that is present at birth

Other synonyms of congenital defect include birth defect, congenital anomaly, congenital disorder.

congenital defect (noun)	congenital abnormality (noun)
a defect that is present at birth	a defect that is present at birth