Mystress or Maistress: How To spell?

The word Mystress is misspelled against Maistress, a noun meaning "Mistress."

Word contains consecutive vowels 'AI' in between alphabets m & stress is misspelled as 'Y'
Wrong Spelling:  m-y-stress 
Correct Spelling:  m-ai-stress 
Explore spell check of Maistress to spell without errors.

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