The word Headseil is misspelled against Headsail, a noun meaning "Any sail set forward of the foremast."
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Word contains consecutive vowels 'AI' in between alphabets heads & l is misspelled as 'EI'
Wrong Spelling:  heads-ei-l 
Correct Spelling:  heads-ai-l 
Find more wrongly spelled words of Headsail to spell it well.