Castic or Caustic: How To spell?

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

Word contains consecutive vowels 'AU' in between alphabets c & stic is misspelled as 'A' as letter 'U' is phonetically ignored
Wrong Spelling: c-a-stic
Correct Spelling: c-au-stic
Find more wrongly spelled words of Caustic to spell it well.