The word Horridnes is misspelled against Horridness, a noun meaning "The quality of being horrid."
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Horridness has double 'ss' in the end mispronounced as 's'
Remember double 'SS' appears in the end of this word which should not be misspelled with single 'S'
Wrong Spelling:  horridne-s 
Correct Spelling:  horridne-ss 
Find more incorrect spellings of Horridness to spell right way.