Travaling or Travailing: How To spell?

The word Travaling is misspelled against Travailing, which is present continuous of "Travail"

Word contains consecutive vowels 'AI' in between alphabets trav & ling is misspelled as 'A'
Wrong Spelling: trav-a-ling
Correct Spelling: trav-ai-ling
Find more wrongly spelled words of Travailing to spell it well.