Caosticily or Causticily: How To spell?

The word Caosticily is misspelled against Causticily, a noun meaning "Severity of language; sarcasm; as, the causticity of a reply or remark."

Word contains consecutive vowels 'AU' in between alphabets c & sticily is misspelled as 'AO'
Wrong Spelling:  c-ao-sticily 
Correct Spelling:  c-au-sticily 
Find more incorrect spellings of Causticily to spell right way.

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