Tavtomerism or Tautomerism: How To spell?

The word Tavtomerism is misspelled against Tautomerism, a noun meaning "The condition, quality, or relation of metameric substances, or their respective derivatives, which are more or less interchangeable, according as one form or the other is the more stable. It is a special case of metamerism; thus, the lactam and the lactim compounds exhibit tautomerism."

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

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