Clustra or Claustra: How To spell?

The word Clustra is misspelled against Claustra, which is plural of "Claustrum"

Word contains consecutive vowels 'AU' in between alphabets cl & stra is misspelled as 'U' as letter 'A' is phonetically ignored
Wrong Spelling: cl-u-stra
Correct Spelling: cl-au-stra
Check more misspelled words of Claustra to spell it correct.