colour blindness vs colour vision deficiency

colour blindness and colour vision deficiency both are nouns.

Word	Noun	Adjective	Verb	Adverb
colour blindness	Yes	No	No	No
colour vision deficiency	Yes	No	No	No

As nouns, colour blindness and colour vision deficiency are synonyms defined as:

colour blindness and colour vision deficiency: genetic inability to distinguish differences in hue

Other synonyms of colour blindness include color blindness, color vision deficiency.

colour blindness (noun)	colour vision deficiency (noun)
genetic inability to distinguish differences in hue	genetic inability to distinguish differences in hue