Thriding or Thridding: How To spell?

The word Thriding is misspelled against Thridding, which is present continuous of "Thrid"

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