Overslagh or Overslaugh: How To spell?

The word Overslagh is misspelled against Overslaugh, a noun meaning "A bar in a river; as, the overslaugh in the Hudson River."

Word contains consecutive vowels 'AU' in between alphabets oversl & gh is misspelled as 'A' as letter 'U' is phonetically ignor
Wrong Spelling:  oversl-a-gh 
Correct Spelling:  oversl-au-gh 
Explore spell check of Overslaugh to spell without errors.

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