Monprise or Mainprise: How To spell?

The word Monprise is misspelled against Mainprise, a noun meaning "A writ directed to the sheriff, commanding him to take sureties, called mainpernors, for the prisoner's appearance, and to let him go at large. This writ is now obsolete."

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

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