birth defect vs congenital disorder

birth defect and congenital disorder both are nouns.

Word	Noun	Adjective	Verb	Adverb
birth defect	Yes	No	No	No
congenital disorder	Yes	No	No	No

As nouns, birth defect and congenital disorder are synonyms defined as:

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

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