Soundnes or Soundness: How To spell?
The word Soundnes is misspelled against Soundness, a noun meaning "The quality or state of being sound; as, the soundness of timber, of fruit, of the teeth, etc.; the soundness of reasoning or argument; soundness of faith."
Soundness 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:  soundne-s  Correct Spelling:  soundne-ss 
Check more misspelled words of Soundness to spell it correct.