Blackmul or Blackmail: How To spell?

The word Blackmul is misspelled against Blackmail, a noun meaning "A certain rate of money, corn, cattle, or other thing, anciently paid, in the north of England and south of Scotland, to certain men who were allied to robbers, or moss troopers, to be by them protected from pillage."

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

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