Pili or Pilei: How To spell?

The word Pili is misspelled against Pilei, which is plural of "Pileus"

Word end with consecutive vowels 'EI' preceded by alphabets 'pil' is misspelled as 'I' as letter 'E' is phonetically ignored
Wrong Spelling:  pil-i 
Correct Spelling:  pil-ei 
Find more wrongly spelled words of Pilei to spell it well.