Cationed or Cautioned: How To spell?

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

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