Reys or Rais: How To spell?

The word Reys is misspelled against Rais, a noun meaning "Same as 2d Reis."

Word contains consecutive vowels 'AI' in between alphabets r & s is misspelled as 'EY'
Wrong Spelling:  r-ey-s 
Correct Spelling:  r-ai-s 
Explore spell check of Rais to spell without errors.

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