The word Caterwul is misspelled against Caterwaul, a noun meaning "A caterwauling."
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Word contains consecutive vowels 'AU' in between alphabets caterw & l is misspelled as 'U' as letter 'A' is phonetically ignore
Wrong Spelling:  caterw-u-l 
Correct Spelling:  caterw-au-l 
Check more misspelled words of Caterwaul to spell it correct.