pallidness vs achromasia

pallidness and achromasia both are nouns.

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

As nouns, pallidness and achromasia are synonyms defined as:

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

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

pallidness (noun)	achromasia (noun)
unnatural lack of color in the skin (as from bruising or sickness or emotional distress)	unnatural lack of color in the skin (as from bruising or sickness or emotional distress)