Filer or Filler: How To spell?
The word Filer is misspelled against Filler, a noun meaning "A thill horse."
Filler has double "ll" is mispronounced as "l"Remember double 'LL' in between the strings fi & er which should not be misspelled with single 'L'
Wrong Spelling:  fi-l-er  Correct Spelling:  fi-ll-er 
Find more wrongly spelled words of Filler to spell it well.