Underhad or Underhead: How To spell?

The word Underhad is misspelled against Underhead, a noun meaning "A blockhead, or stupid person; a dunderhead."

Underhead has vowels 'ea' together mispronounced as 'a'
Word contains consecutive vowels 'EA' in between alphabets underh & d is misspelled as 'A'
Wrong Spelling:  underh-a-d 
Correct Spelling:  underh-ea-d 
Explore spell check of Underhead to spell without errors.

You might be interested to know

Unprach or Unpreach?

Ural or Ureal?

War or Wear?