Cavtioned or Cautioned: How To spell?

The word Cavtioned is misspelled against Cautioned, which is past tense of "Caution"

Word contains consecutive vowels 'AU' in between alphabets c & tioned is misspelled as 'AV'
Wrong Spelling:  c-av-tioned 
Correct Spelling:  c-au-tioned 
Find more incorrect spellings of Cautioned to spell right way.

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