Aditionary or Additionary: How To spell?
The word Aditionary is misspelled against Additionary, an adjective meaning "Additional."
Additionary has double "dd" is mispronounced as "d"Remember double 'DD' in between the strings A & itionary which should not be misspelled with single 'D'
Wrong Spelling:  A-d-itionary  Correct Spelling:  A-dd-itionary 
Find more incorrect spellings of Additionary to spell right way.