Thaysm or Theism: How To spell?

The word Thaysm is misspelled against Theism, meaning "Belief in God."

Word contains consecutive vowels 'EI' in between alphabets th & sm is misspelled as 'AY'
Wrong Spelling:  th-ay-sm 
Correct Spelling:  th-ei-sm 
Browse incorrect spellings of Theism to spell it good.