Deceising or Deceasing: How To spell?

The word Deceising is misspelled against Deceasing, which is present continuous of "Decease"

--> Deceasing has vowels 'ea' together mispronounced as 'ei'
Word contains consecutive vowels 'EA' in between alphabets dec & sing is misspelled as 'EI'
Wrong Spelling:  dec-ei-sing 
Correct Spelling:  dec-ea-sing 
Find more wrongly spelled words of Deceasing to spell it well.

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