Superanuation or Superannuation: How To spell?
The word Superanuation is misspelled against Superannuation, a noun meaning "The state of being superannuated, or too old for office or business; the state of being disqualified by old age; decrepitude."
Superannuation has double "nn" is mispronounced as "n"Remember double 'NN' in between the strings supera & uation which should not be misspelled with single 'N'
Wrong Spelling:  supera-n-uation  Correct Spelling:  supera-nn-uation 
Check more misspelled words of Superannuation to spell it correct.