Intersertion or Interserttion: How To spell?
The word Intersertion is misspelled against Interserttion, a noun meaning "The act of interserting, or that which is interserted."
Interserttion has double "tt" is mispronounced as "t"Remember double 'TT' in between the strings interser & ion which should not be misspelled with single 'T'
Wrong Spelling:  interser-t-ion  Correct Spelling:  interser-tt-ion 
Find more incorrect spellings of Interserttion to spell right way.