Monpin or Mainpin: How To spell?

The word Monpin is misspelled against Mainpin, a noun meaning "A kingbolt."

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

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