Traveiled or Travailed: How To spell?

The word Traveiled is misspelled against Travailed, which is past tense of "Travail"

Word contains consecutive vowels 'AI' in between alphabets trav & led is misspelled as 'EI'
Wrong Spelling:  trav-ei-led 
Correct Spelling:  trav-ai-led 
Find more wrongly spelled words of Travailed to spell it well.

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