paleness vs pallor

paleness and pallor both are nouns.

Word	Noun	Adjective	Verb	Adverb
paleness	Yes	No	No	No
pallor	Yes	No	No	No

As nouns, paleness and pallor are synonyms defined as:

paleness and pallor: unnatural lack of color in the skin (as from bruising or sickness or emotional distress)

Other synonyms of paleness include achromasia, lividity, lividness, luridness, pallidness, wanness.

paleness (noun)	pallor (noun)
being deficient in color	unnatural lack of color in the skin (as from bruising or sickness or emotional distress)
the property of having a naturally light complexion
unnatural lack of color in the skin (as from bruising or sickness or emotional distress)