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