Sadening or Saddening: How To spell?

The word Sadening is misspelled against Saddening, which is present continuous of "Sadden"

Saddening has double "dd" is mispronounced as "d"
Remember double 'DD' in between the strings Sa & ening which should not be misspelled with single 'D'
Wrong Spelling: Sa-d-ening
Correct Spelling: Sa-dd-ening
Find more wrongly spelled words of Saddening to spell it well.