Discusion or Discussion: How To spell?
The word Discusion is misspelled against Discussion, a noun meaning "The act of discussing or exchanging reasons; examination by argument; debate; disputation; agitation."
Discussion has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings discu & ion which should not be misspelled with single 'S'
Wrong Spelling:  discu-s-ion  Correct Spelling:  discu-ss-ion 
Check more misspelled words of Discussion to spell it correct.