Sabeesm or Sabeism: How To spell?

The word Sabeesm is misspelled against Sabeism, a noun meaning "Same as Sabianism."

Word contains consecutive vowels 'EI' in between alphabets sab & sm is misspelled as 'EE'
Wrong Spelling:  sab-ee-sm 
Correct Spelling:  sab-ei-sm 
Explore spell check of Sabeism to spell without errors.