Synonyms of the word 
GHASTLINESS → FRIGHTFULNESS - GRIMNESS - GRUESOMENESS - LURIDNESS
ghastliness
- n. The state of being ghastly.
- n. A ghastly thing.
frightfulness
- n. The quality of being frightful.
grimness
- n. The characteristic or quality of being grim.
gruesomeness
- n. The characteristic or quality of being gruesome.
luridness
- n. The property of being lurid.
If you are interested in words, visit the following sites :
- wiktionary.org/ghastliness For complete definition of a word
- 1word.ws/ghastliness to play with words, suffixs, prefixs, etc.