Slon or Slain: How To spell?

The word Slon is misspelled against Slain, which is past perfect of "Slay"

Word contains consecutive vowels 'AI' in between alphabets sl & n is misspelled as 'O'
Wrong Spelling:  sl-o-n 
Correct Spelling:  sl-ai-n 
Find more incorrect spellings of Slain to spell right way.

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