Diferenced or Differenced: How To spell?

The word Diferenced is misspelled against Differenced, which is past tense of "Difference"

Differenced has double "ff" is mispronounced as "f"
Remember double 'FF' in between the strings Di & erenced which should not be misspelled with single 'F'
Wrong Spelling: Di-f-erenced
Correct Spelling: Di-ff-erenced
Find more wrongly spelled words of Differenced to spell it well.