Umlaat or Umlaut: How To spell?

The word Umlaat is misspelled against Umlaut, a noun meaning "The euphonic modification of a root vowel sound by the influence of a, u, or especially i, in the syllable which formerly followed."

Word contains consecutive vowels 'AU' in between alphabets uml & t is misspelled as 'AA'
Wrong Spelling:  uml-aa-t 
Correct Spelling:  uml-au-t 
Browse incorrect spellings of Umlaut to spell it good.

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