The word Haydline is misspelled against Headline, a noun meaning "The line at the head or top of a page."
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Headline has vowels 'ea' together mispronounced as 'ay'
Word contains consecutive vowels 'EA' in between alphabets h & dline is misspelled as 'AY'
Wrong Spelling:  h-ay-dline 
Correct Spelling:  h-ea-dline 
Find more wrongly spelled words of Headline to spell it well.