Nuling or Nailing: How To spell?

The word Nuling is misspelled against Nailing, which is present continuous of "Nail"

Word contains consecutive vowels 'AI' in between alphabets n & ling is misspelled as 'U'
Wrong Spelling:  n-u-ling 
Correct Spelling:  n-ai-ling 
Check more misspelled words of Nailing to spell it correct.

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