Trithesm or Tritheism: How To spell?

The word Trithesm is misspelled against Tritheism, a noun meaning "The opinion or doctrine that the Father, Son, and Holy Spirit are three distinct Gods."

Word contains consecutive vowels 'EI' in between alphabets trith & sm is misspelled as 'E' as letter 'I' is phonetically ignore
Wrong Spelling:  trith-e-sm 
Correct Spelling:  trith-ei-sm 
Find more wrongly spelled words of Tritheism to spell it well.