Succusion or Succussion: How To spell?
The word Succusion is misspelled against Succussion, a noun meaning "The act of shaking; a shake; esp. (Med.), a shaking of the body to ascertain if there be a liquid in the thorax."
Succussion has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings succu & ion which should not be misspelled with single 'S'
Wrong Spelling:  succu-s-ion  Correct Spelling:  succu-ss-ion 
Check more misspelled words of Succussion to spell it correct.