Hadstrongness or Headstrongness: How To spell?

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

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

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