Custic or Caustic: How To spell?

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

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