Countervul or Countervail: How To spell?

The word Countervul is misspelled against Countervail, meaning "counterbalance"

Word contains consecutive vowels 'AI' in between alphabets counterv & l is misspelled as 'U'
Wrong Spelling:  counterv-u-l 
Correct Spelling:  counterv-ai-l 
Check more misspelled words of Countervail to spell it correct.

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