Montoned or Maintained: How To spell?

The word Montoned is misspelled against Maintained, which is past tense of "Maintain"

Word contains consecutive vowels 'AI' twice is misspelled as 'O'
Wrong Spelling:  m-o-nt-o-ned 
Correct Spelling:  m-ai-nt-ai-ned 
Find more incorrect spellings of Maintained to spell right way.

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