Reyn or Rein: How To spell?

The word Reyn is misspelled against Rein, meaning "A step attached to the bit for controlling a horse or other draft-animal."

Word contains consecutive vowels 'EI' in between alphabets r & n is misspelled as 'EY'
Wrong Spelling:  r-ey-n 
Correct Spelling:  r-ei-n 
Explore spell check of Rein to spell without errors.