Theusm or Theism: How To spell?

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

Word contains consecutive vowels 'EI' in between alphabets th & sm is misspelled as 'EU'
Wrong Spelling:  th-eu-sm 
Correct Spelling:  th-ei-sm 
Check more misspelled words of Theism to spell it correct.