Thavmatrope or Thaumatrope: How To spell?

The word Thavmatrope is misspelled against Thaumatrope, a noun meaning "An optical instrument or toy for showing the presistence of an impression upon the eyes after the luminous object is withdrawn."

Word contains consecutive vowels 'AU' in between alphabets th & matrope is misspelled as 'AV'
Wrong Spelling:  th-av-matrope 
Correct Spelling:  th-au-matrope 
Find more incorrect spellings of Thaumatrope to spell right way.

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