Synonyms of the word 
HORRIDNESS → AWFULNESS - DREADFULNESS - TERRIBLENESS - UNPLEASANTNESS
horridness
- n. The quality of being horrid.
awfulness
- n. The state or quality of being awful.
- n. The quality of striking with awe, or with reverence; dreadfulness; solemnity.
- n. The state of being struck with awe; a spirit of solemnity; profound reverence.
dreadfulness
- n. The characteristic of being dreadful.
terribleness
- n. The characteristic of being terrible.
unpleasantness
- n. (uncountable) The property of being unpleasant or disagreeable.
- n. (countable) An unpleasant behaviour, occurrence, etc.
If you are interested in words, visit the following sites :
- wiktionary.org/horridness For complete definition of a word
- 1word.ws/horridness to play with words, suffixs, prefixs, etc.