Boatswian or Boatswain: How To spell?

The word Boatswian is misspelled against Boatswain, meaning "A subordinate officer of a vessel, who has general charge of the rigging, anchors, etc."

Word contains consecutive vowels 'AI' in between alphabets boatsw & n is misspelled as 'IA'
Wrong Spelling:  boatsw-ia-n 
Correct Spelling:  boatsw-ai-n 
Find more incorrect spellings of Boatswain to spell right way.

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