Dunderhad or Dunderhead: How To spell?

The word Dunderhad is misspelled against Dunderhead, a noun meaning "A dunce; a numskull; a blockhead."

Dunderhead has vowels 'ea' together mispronounced as 'a'
Word contains consecutive vowels 'EA' in between alphabets dunderh & d is misspelled as 'A'
Wrong Spelling:  dunderh-a-d 
Correct Spelling:  dunderh-ea-d 
Check more misspelled words of Dunderhead to spell it correct.

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