Dreadnought or Dreadnaught: How To spell?

The word Dreadnought is misspelled against Dreadnaught, a noun meaning "A fearless person."

Word contains consecutive vowels 'AU' in between alphabets dreadn & ght is misspelled as 'OU'
Wrong Spelling:  dreadn-ou-ght 
Correct Spelling:  dreadn-au-ght 
Check more misspelled words of Dreadnaught to spell it correct.

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