Onslaght or Onslaught: How To spell?

The word Onslaght is misspelled against Onslaught, meaning "A violent onset."

Word contains consecutive vowels 'AU' in between alphabets onsl & ght is misspelled as 'A' as letter 'U' is phonetically ignore
Wrong Spelling:  onsl-a-ght 
Correct Spelling:  onsl-au-ght 
Browse incorrect spellings of Onslaught to spell it good.

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