Slian or Slain: How To spell?

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

Word contains consecutive vowels 'AI' in between alphabets sl & n is misspelled as 'IA'
Wrong Spelling: sl-ia-n
Correct Spelling: sl-ai-n
Find more wrongly spelled words of Slain to spell it well.