Disinteresment or Disinteressment: How To spell?
The word Disinteresment is misspelled against Disinteressment, a noun meaning "Disinterestedness; impartiality; fairness."
Disinteressment has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings disintere & ment which should not be misspelled with single 'S'
Wrong Spelling:  disintere-s-ment  Correct Spelling:  disintere-ss-ment 
Find more wrongly spelled words of Disinteressment to spell it well.