Engraoling or Engrailing: How To spell?

The word Engraoling is misspelled against Engrailing, which is present continuous of "Engrail"

Word contains consecutive vowels 'AI' in between alphabets engr & ling is misspelled as 'AO'
Wrong Spelling:  engr-ao-ling 
Correct Spelling:  engr-ai-ling 
Find more incorrect spellings of Engrailing to spell right way.

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