Overstad or Overstaid: How To spell?

The word Overstad is misspelled against Overstaid, which is past tense of "Overstay"

Word contains consecutive vowels 'AI' in between alphabets overst & d is misspelled as 'A'
Wrong Spelling:  overst-a-d 
Correct Spelling:  overst-ai-d 
Explore spell check of Overstaid to spell without errors.

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