Precation or Precaution: How To spell?

The word Precation is misspelled against Precaution, a noun meaning "A measure taken beforehand to ward off evil or secure good or success; a precautionary act; as, to take precautions against accident."

Word contains consecutive vowels 'AU' in between alphabets prec & tion is misspelled as 'A' as letter 'U' is phonetically ignor
Wrong Spelling:  prec-a-tion 
Correct Spelling:  prec-au-tion 
Find more incorrect spellings of Precaution to spell right way.

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