paleness vs pallidness

paleness and pallidness both are nouns.

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

As nouns, paleness and pallidness are synonyms defined as:

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

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

paleness (noun)	pallidness (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)