Rauning or Raining: How To spell?

The word Rauning is misspelled against Raining, which is present continuous of "Rain"

Word contains consecutive vowels 'AI' in between alphabets r & ning is misspelled as 'AU'
Wrong Spelling:  r-au-ning 
Correct Spelling:  r-ai-ning 
Check more misspelled words of Raining to spell it correct.

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