The word Casualnes is misspelled against Casualness, a noun meaning "The quality of being casual."
-->
Casualness 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:  casualne-s 
Correct Spelling:  casualne-ss 
Check more misspelled words of Casualness to spell it correct.