whitey vs White person

whitey and White person both are nouns.

Word	Noun	Adjective	Verb	Adverb
whitey	Yes	No	No	No
White person	Yes	No	No	No

As nouns, White person is a hypernym of whitey; that is, White person is a word with a broader meaning than whitey:

whitey: (slang) offensive names for a White man
White person: a person of European descent with a light-skinned or pale complexion

Other hypernyms of whitey include Caucasian, White.

whitey (noun)	White person (noun)
(slang) offensive names for a White man	a person of European descent with a light-skinned or pale complexion