Terzeto or Terzetto: How To spell?
The word Terzeto is misspelled against Terzetto, a noun meaning "A composition in three voice parts; a vocal (rarely an instrumental) trio."
Terzetto has double "tt" is mispronounced as "t"Remember double 'TT' in between the strings terze & o which should not be misspelled with single 'T'
Wrong Spelling:  terze-t-o  Correct Spelling:  terze-tt-o 
Find more incorrect spellings of Terzetto to spell right way.