Caterwouled or Caterwauled: How To spell?

The word Caterwouled is misspelled against Caterwauled, which is past tense of "Caterwaul"

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

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