Rain or Rein: How To spell?

The word Rain 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 'AI'
Wrong Spelling:  r-ai-n 
Correct Spelling:  r-ei-n 
Find more wrongly spelled words of Rein to spell it well.