tongue tie vs congenital defect

tongue tie and congenital defect both are nouns.

Word	Noun	Adjective	Verb	Adverb
tongue tie	Yes	No	No	No
congenital defect	Yes	No	No	No

As nouns, congenital defect is a hypernym of tongue tie; that is, congenital defect is a word with a broader meaning than tongue tie:

tongue tie: a congenital anomaly in which the mucous membrane under the tongue is too short limiting the mobility of the tongue
congenital defect: a defect that is present at birth

Other hypernyms of tongue tie include birth defect, congenital abnormality, congenital anomaly, congenital disorder.

tongue tie (noun)	congenital defect (noun)
a congenital anomaly in which the mucous membrane under the tongue is too short limiting the mobility of the tongue	a defect that is present at birth