Siath or Saith: How To spell?

The word Siath is misspelled against Saith, which is past tense of "Say."

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