Cuastic or Caustic: How To spell?

The word Cuastic is misspelled against Caustic, meaning "biting sarcastic"

Word contains consecutive vowels 'AU' in between alphabets c & stic is misspelled as 'UA'
Wrong Spelling:  c-ua-stic 
Correct Spelling:  c-au-stic 
Check more misspelled words of Caustic to spell it correct.

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