Osifying or Ossifying: How To spell?
The word Osifying is misspelled against Ossifying, an adjective meaning "Changing into bone; becoming bone; as, the ossifying process."
Ossifying has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings o & ifying which should not be misspelled with single 'S'
Wrong Spelling:  o-s-ifying  Correct Spelling:  o-ss-ifying 
Find more wrongly spelled words of Ossifying to spell it well.