Attonting or Attainting: How To spell?

The word Attonting is misspelled against Attainting, which is present continuous of "Attaint"

Word contains consecutive vowels 'AI' in between alphabets att & nting is misspelled as 'O'
Wrong Spelling:  att-o-nting 
Correct Spelling:  att-ai-nting 
Find more incorrect spellings of Attainting to spell right way.

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