Trithaust or Tritheist: How To spell?

The word Trithaust is misspelled against Tritheist, a noun meaning "One who believes in tritheism."

Word contains consecutive vowels 'EI' in between alphabets trith & st is misspelled as 'AU'
Wrong Spelling:  trith-au-st 
Correct Spelling:  trith-ei-st 
Check more misspelled words of Tritheist to spell it correct.