Flathad or Flathead: How To spell?

The word Flathad is misspelled against Flathead, a noun meaning "A Chinook Indian. See Chinook, n., 1."

Flathead has vowels 'ea' together mispronounced as 'a'
Word contains consecutive vowels 'EA' in between alphabets flath & d is misspelled as 'A'
Wrong Spelling:  flath-a-d 
Correct Spelling:  flath-ea-d 
Browse incorrect spellings of Flathead to spell it good.

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