Voultage or Vaultage: How To spell?

The word Voultage is misspelled against Vaultage, a noun meaning "Vaulted work; also, a vaulted place; an arched cellar."

Word contains consecutive vowels 'AU' in between alphabets v & ltage is misspelled as 'OU'
Wrong Spelling:  v-ou-ltage 
Correct Spelling:  v-au-ltage 
Check more misspelled words of Vaultage to spell it correct.

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