Casec or Caseic: How To spell?

The word Casec is misspelled against Caseic, an adjective meaning "pertaining to cheese; as, caseic acid."

Word contains consecutive vowels 'EI' in between alphabets cas & c is misspelled as 'E' as letter 'I' is phonetically ignored
Wrong Spelling:  cas-e-c 
Correct Spelling:  cas-ei-c 
Explore spell check of Caseic to spell without errors.