The word Thickhaed is misspelled against Thickhead, a noun meaning "A thick-headed or stupid person."
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Thickhead has vowels 'ea' together mispronounced as 'ae'
Word contains consecutive vowels 'EA' in between alphabets thickh & d is misspelled as 'AE'
Wrong Spelling:  thickh-ae-d 
Correct Spelling:  thickh-ea-d 
Find more wrongly spelled words of Thickhead to spell it well.