Percusion or Percussion: How To spell?
The word Percusion is misspelled against Percussion, meaning "The sharp striking of one body against another."
Percussion has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings percu & ion which should not be misspelled with single 'S'
Wrong Spelling:  percu-s-ion  Correct Spelling:  percu-ss-ion 
Check more misspelled words of Percussion to spell it correct.