Avoling or Availing: How To spell?

The word Avoling is misspelled against Availing, which is present continuous of "Avail"

Word contains consecutive vowels 'AI' in between alphabets av & ling is misspelled as 'O'
Wrong Spelling:  av-o-ling 
Correct Spelling:  av-ai-ling 
Find more incorrect spellings of Availing to spell right way.

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