Sightfulnes or Sightfulness: How To spell?
The word Sightfulnes is misspelled against Sightfulness, a noun meaning "The state of being sightful; perspicuity."
Sightfulness 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:  sightfulne-s  Correct Spelling:  sightfulne-ss 
Check more misspelled words of Sightfulness to spell it correct.