The word Dreadnught is misspelled against Dreadnaught, a noun meaning "A fearless person."
-->
Word contains consecutive vowels 'AU' in between alphabets dreadn & ght is misspelled as 'U' as letter 'A' is phonetically igno
Wrong Spelling:  dreadn-u-ght 
Correct Spelling:  dreadn-au-ght 
Check more misspelled words of Dreadnaught to spell it correct.