Athyst or Atheist: How To spell?

The word Athyst is misspelled against Atheist, a noun meaning "A godless person."

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