The word Dun is misspelled against Daun, a noun meaning "A variant of Dan, a title of honor."
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Word contains consecutive vowels 'AU' in between alphabets d & n is misspelled as 'U' as letter 'A' is phonetically ignored
Wrong Spelling:  d-u-n 
Correct Spelling:  d-au-n 
Check more misspelled words of Daun to spell it correct.