Fosilification or Fossilification: How To spell?
The word Fosilification is misspelled against Fossilification, a noun meaning "The process of becoming fossil."
Fossilification has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings fo & ilification which should not be misspelled with single 'S'
Wrong Spelling:  fo-s-ilification  Correct Spelling:  fo-ss-ilification 
Find more incorrect spellings of Fossilification to spell right way.