Antitheysm or Antitheism: How To spell?

The word Antitheysm is misspelled against Antitheism, a noun meaning "The doctrine of antitheists."

Word contains consecutive vowels 'EI' in between alphabets antith & sm is misspelled as 'EY'
Wrong Spelling:  antith-ey-sm 
Correct Spelling:  antith-ei-sm 
Find more wrongly spelled words of Antitheism to spell it well.