Mianprising or Mainprising: How To spell?

The word Mianprising is misspelled against Mainprising, which is present continuous of "Mainprise"

Word contains consecutive vowels 'AI' in between alphabets m & nprising is misspelled as 'IA'
Wrong Spelling:  m-ia-nprising 
Correct Spelling:  m-ai-nprising 
Find more wrongly spelled words of Mainprising to spell it well.

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