Rider or Ridder: How To spell?
The word Rider is misspelled against Ridder, a noun meaning "One who, or that which, rids."
Ridder has double "dd" is mispronounced as "d"Remember double 'DD' in between the strings Ri & er which should not be misspelled with single 'D'
Wrong Spelling:  Ri-d-er  Correct Spelling:  Ri-dd-er 
Find more wrongly spelled words of Ridder to spell it well.