Heydstrongness or Headstrongness: How To spell?

The word Heydstrongness is misspelled against Headstrongness, a noun meaning "Obstinacy."

Headstrongness has vowels 'ea' together mispronounced as 'ey'
Word contains consecutive vowels 'EA' in between alphabets h & dstrongness is misspelled as 'EY'
Wrong Spelling:  h-ey-dstrongness 
Correct Spelling:  h-ea-dstrongness 
Find more incorrect spellings of Headstrongness to spell right way.

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