Piling or Pilling: How To spell?

The word Piling is misspelled against Pilling, which is present continuous of "Pill"

Pilling has double "ll" is mispronounced as "l"
Remember double 'LL' in between the strings pi & ing which should not be misspelled with single 'L'
Wrong Spelling:  pi-l-ing 
Correct Spelling:  pi-ll-ing 
Find more wrongly spelled words of Pilling to spell it well.