Exhast or Exhaust: How To spell?

The word Exhast is misspelled against Exhaust, a noun meaning "The foul air let out of a room through a register or pipe provided for the purpose."

Word contains consecutive vowels 'AU' in between alphabets exh & st is misspelled as 'A' as letter 'U' is phonetically ignored
Wrong Spelling:  exh-a-st 
Correct Spelling:  exh-au-st 
Browse incorrect spellings of Exhaust to spell it good.

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