Marais or Mareis: How To spell?

The word Marais is misspelled against Mareis, a noun meaning "A Marsh."

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