albinism vs congenital defect

albinism and congenital defect both are nouns.

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

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

albinism: the congenital absence of pigmentation in the eyes and skin and hair
congenital defect: a defect that is present at birth

albinism (noun)	congenital defect (noun)
the congenital absence of pigmentation in the eyes and skin and hair	a defect that is present at birth