Driling or Drilling: How To spell?
The word Driling is misspelled against Drilling, a noun meaning "A heavy, twilled fabric of linen or cotton."
Drilling has double "ll" is mispronounced as "l"Remember double 'LL' in between the strings dri & ing which should not be misspelled with single 'L'
Wrong Spelling:  dri-l-ing  Correct Spelling:  dri-ll-ing 
Find more wrongly spelled words of Drilling to spell it well.