Athenticating or Authenticating: How To spell?

The word Athenticating is misspelled against Authenticating, which is present continuous of "Authenticate"

Word begins with consecutive vowels 'AU' followed by alphabets 'thenticating' is misspelled as 'A' as letter 'U' is phonetically
Wrong Spelling: a-thenticating
Correct Spelling: au-thenticating
Find more wrongly spelled words of Authenticating to spell it well.