Demicanon or Demicannon: How To spell?
The word Demicanon is misspelled against Demicannon, a noun meaning "A kind of ordnance, carrying a ball weighing from thirty to thirty-six pounds."
Demicannon has double "nn" is mispronounced as "n"Remember double 'NN' in between the strings demica & on which should not be misspelled with single 'N'
Wrong Spelling:  demica-n-on  Correct Spelling:  demica-nn-on 
Find more incorrect spellings of Demicannon to spell right way.