Quasation or Quassation: How To spell?
The word Quasation is misspelled against Quassation, a noun meaning "The act of shaking, or the state of being shaken."
Quassation has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings qua & ation which should not be misspelled with single 'S'
Wrong Spelling:  qua-s-ation  Correct Spelling:  qua-ss-ation 
Check more misspelled words of Quassation to spell it correct.