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