Imaterialness or Immaterialness: How To spell?
The word Imaterialness is misspelled against Immaterialness, a noun meaning "The state or quality of being immaterial; immateriality."
Immaterialness has double "mm" is mispronounced as "m"Remember double 'MM' in between the strings i & aterialness which should not be misspelled with single 'M'
Wrong Spelling:  i-m-aterialness  Correct Spelling:  i-mm-aterialness 
Find more wrongly spelled words of Immaterialness to spell it well.