Spontaneties or Spontaneities: How To spell?

The word Spontaneties is misspelled against Spontaneities, which is plural of "Spontaneity"

Word contains consecutive vowels 'EI' in between alphabets spontan & ties is misspelled as 'E' as letter 'I' is phonetically ig
Wrong Spelling:  spontan-e-ties 
Correct Spelling:  spontan-ei-ties 
Find more incorrect spellings of Spontaneities to spell right way.