Upstiars or Upstairs: How To spell?

The word Upstiars is misspelled against Upstairs, an adjective meaning "Being above stairs; as, an upstairs room."

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

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