Disinterestednes or Disinterestedness: How To spell?
The word Disinterestednes is misspelled against Disinterestedness, a noun meaning "The state or quality of being disinterested; impartiality."
Disinterestedness 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:  disinterestedne-s  Correct Spelling:  disinterestedne-ss 
Find more wrongly spelled words of Disinterestedness to spell it well.