Holocaast or Holocaust: How To spell?

The word Holocaast is misspelled against Holocaust, a noun meaning "A burnt sacrifice; an offering, the whole of which was consumed by fire, among the Jews and some pagan nations."

Word contains consecutive vowels 'AU' in between alphabets holoc & st is misspelled as 'AA'
Wrong Spelling:  holoc-aa-st 
Correct Spelling:  holoc-au-st 
Find more incorrect spellings of Holocaust to spell right way.

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