Prevaolment or Prevailment: How To spell?

The word Prevaolment is misspelled against Prevailment, a noun meaning "Prevalence; superior influence; efficacy."

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

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