luridness vs ghastliness

luridness and ghastliness both are nouns.

Word	Noun	Adjective	Verb	Adverb
luridness	Yes	No	No	No
ghastliness	Yes	No	No	No

As nouns, luridness and ghastliness are synonyms defined as:

Other synonyms of luridness include grimness, gruesomeness.

luridness (noun)	ghastliness (noun)
the quality of being ghastly	the quality of being ghastly
unnatural lack of color in the skin (as from bruising or sickness or emotional distress)
the journalistic use of subject matter that appeals to vulgar tastes