grimness vs luridness

grimness and luridness both are nouns.

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

As nouns, grimness and luridness are synonyms defined as:

Other synonyms of grimness include ghastliness, gruesomeness.

grimness (noun)	luridness (noun)
something hard to endure	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