Contrabaso or Contrabasso: How To spell?
The word Contrabaso is misspelled against Contrabasso, a noun meaning "The largest kind of bass viol. See Violone."
Contrabasso has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings contraba & o which should not be misspelled with single 'S'
Wrong Spelling:  contraba-s-o  Correct Spelling:  contraba-ss-o 
Find more incorrect spellings of Contrabasso to spell right way.