Rigidnes or Rigidness: How To spell?
The word Rigidnes is misspelled against Rigidness, a noun meaning "The quality or state of being rigid."
Rigidness 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:  rigidne-s  Correct Spelling:  rigidne-ss 
Find more wrongly spelled words of Rigidness to spell it well.