Diferential or Differential: How To spell?
The word Diferential is misspelled against Differential, a noun meaning "A form of conductor used for dividing and distributing the current to a series of electric lamps so as to maintain equal action in all."
Differential has double "ff" is mispronounced as "f"Remember double 'FF' in between the strings Di & erential which should not be misspelled with single 'F'
Wrong Spelling:  Di-f-erential  Correct Spelling:  Di-ff-erential 
Find more wrongly spelled words of Differential to spell it well.