Disertation or Dissertation: How To spell?
The word Disertation is misspelled against Dissertation, meaning "Thesis."
Dissertation has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings di & ertation which should not be misspelled with single 'S'
Wrong Spelling:  di-s-ertation  Correct Spelling:  di-ss-ertation 
Find more incorrect spellings of Dissertation to spell right way.