dichromat vs color-blind person

dichromat and color-blind person both are nouns.

Word	Noun	Adjective	Verb	Adverb
dichromat	Yes	No	No	No
color-blind person	Yes	No	No	No

As nouns, color-blind person is a hypernym of dichromat; that is, color-blind person is a word with a broader meaning than dichromat:

dichromat (noun)	color-blind person (noun)
a person with any of the various forms of dichromacy	a person unable to distinguish differences in hue