Atton or Attain: How To spell?

The word Atton is misspelled against Attain, a noun meaning "Attainment."

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

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