Difer or Differ: How To spell?
The word Difer is misspelled against Differ, a verb meaning "To be of unlike or opposite opinion; to disagree in sentiment; -- often with from or with."
Differ has double "ff" is mispronounced as "f"Remember double 'FF' in between the strings Di & er which should not be misspelled with single 'F'
Wrong Spelling:  Di-f-er  Correct Spelling:  Di-ff-er 
Find more wrongly spelled words of Differ to spell it well.