Diferentiator or Differentiator: How To spell?
The word Diferentiator is misspelled against Differentiator, a noun meaning "One who, or that which, differentiates."
Differentiator has double "ff" is mispronounced as "f"Remember double 'FF' in between the strings Di & erentiator which should not be misspelled with single 'F'
Wrong Spelling:  Di-f-erentiator  Correct Spelling:  Di-ff-erentiator 
Find more incorrect spellings of Differentiator to spell right way.