Rifler or Riffler: How To spell?
The word Rifler is misspelled against Riffler, a noun meaning "A curved file used in carving wool and marble."
Riffler has double "ff" is mispronounced as "f"Remember double 'FF' in between the strings Ri & ler which should not be misspelled with single 'F'
Wrong Spelling:  Ri-f-ler  Correct Spelling:  Ri-ff-ler 
Find more wrongly spelled words of Riffler to spell it well.