gruesomeness vs ghastliness

gruesomeness and ghastliness both are nouns.

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

As nouns, gruesomeness and ghastliness are synonyms defined as:

Other synonyms of gruesomeness include grimness, luridness.

gruesomeness (noun)	ghastliness (noun)
the quality of being ghastly	the quality of being ghastly