Thyst or Theist: How To spell?

The word Thyst is misspelled against Theist, a noun meaning "One who believes in the existence of a God; especially, one who believes in a personal God; -- opposed to atheist."

Word contains consecutive vowels 'EI' in between alphabets th & st is misspelled as 'Y'
Wrong Spelling:  th-y-st 
Correct Spelling:  th-ei-st 
Navigate all incorrect spellings of Theist to spell it right.