Reis or Rais: How To spell?

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

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