Defaalt or Default: How To spell?

The word Defaalt is misspelled against Default, meaning "loss due to not showing up ; option that is selected automatically"

Word contains consecutive vowels 'AU' in between alphabets def & lt is misspelled as 'AA'
Wrong Spelling: def-aa-lt
Correct Spelling: def-au-lt
Explore spell check of Default to spell without errors.