Monmast or Mainmast: How To spell?

The word Monmast is misspelled against Mainmast, a noun meaning "The principal mast in a ship or other vessel."

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

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