Coustical or Caustical: How To spell?
The word Coustical is misspelled against Caustical, an adjective meaning "Capable of destroying the texture of anything or eating away its substance by chemical action; burning; corrosive; searing."
Word contains consecutive vowels 'AU' in between alphabets c & stical is misspelled as 'OU'Wrong Spelling:  c-ou-stical  Correct Spelling:  c-au-stical 
Check more misspelled words of Caustical to spell it correct.