Ostain or Ostein: How To spell?

The word Ostain is misspelled against Ostein, a noun meaning "Ossein."

Word contains consecutive vowels 'EI' in between alphabets ost & n is misspelled as 'AI'
Wrong Spelling:  ost-ai-n 
Correct Spelling:  ost-ei-n 
Find more wrongly spelled words of Ostein to spell it well.