Rideou or Rideau: How To spell?

The word Rideou is misspelled against Rideau, a noun meaning "A small mound of earth; ground slightly elevated; a small ridge."

Word ends with consecutive vowels 'AU' preceded by alphabets 'ride' is misspelled as 'OU'
Wrong Spelling:  ride-ou 
Correct Spelling:  ride-au 
Check more misspelled words of Rideau to spell it correct.

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