Staurcase or Staircase: How To spell?

The word Staurcase is misspelled against Staircase, a noun meaning "A flight of stairs with their supporting framework, casing, balusters, etc."

Word contains consecutive vowels 'AI' in between alphabets st & rcase is misspelled as 'AU'
Wrong Spelling:  st-au-rcase 
Correct Spelling:  st-ai-rcase 
Check more misspelled words of Staircase to spell it correct.

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