Cadexes or Caudexes: How To spell?

The word Cadexes is misspelled against Caudexes, which is plural of "Caudex"

Word contains consecutive vowels 'AU' in between alphabets c & dexes is misspelled as 'A' as letter 'U' is phonetically ignored
Wrong Spelling: c-a-dexes
Correct Spelling: c-au-dexes
Explore spell check of Caudexes to spell without errors.