Tavtological or Tautological: How To spell?

The word Tavtological is misspelled against Tautological, an adjective meaning "Involving tautology; having the same signification; as, tautological expression."

Word contains consecutive vowels 'AU' in between alphabets t & tological is misspelled as 'AV'
Wrong Spelling:  t-av-tological 
Correct Spelling:  t-au-tological 
Find more incorrect spellings of Tautological to spell right way.

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