The word Clastral is misspelled against Claustral, an adjective meaning "Cloistral."
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Word contains consecutive vowels 'AU' in between alphabets cl & stral is misspelled as 'A' as letter 'U' is phonetically ignore
Wrong Spelling:  cl-a-stral 
Correct Spelling:  cl-au-stral 
Browse incorrect spellings of Claustral to spell it good.