Reater or Reiter: How To spell?

The word Reater is misspelled against Reiter, a noun meaning "A German cavalry soldier of the fourteenth and fifteenth centuries."

Word contains consecutive vowels 'EI' in between alphabets r & ter is misspelled as 'EA'
Wrong Spelling:  r-ea-ter 
Correct Spelling:  r-ei-ter 
Explore spell check of Reiter to spell without errors.