Domsday or Doomsday: How To spell?
The word Domsday is misspelled against Doomsday, a noun meaning "A day of sentence or condemnation; day of death."
Doomsday has double "oo" is mispronounced as "o"Remember double 'OO' in between the strings d & msday which should not be misspelled with single 'O'
Wrong Spelling:  d-o-msday  Correct Spelling:  d-oo-msday 
Find more incorrect spellings of Doomsday to spell right way.