The term 'BASSOON's Kin' can be answered by three different crossword solutions: Oboes (5 letters), Contrabassoon (13 letters), and OBOE (4 letters). The OBOE is a double reed woodwind instrument that is similar to the BASSOON, but smaller in size. The contrabassoon is an even larger version of the BASSOON, and is also a double reed woodwind instrument. Both instruments are commonly used in orchestras and other musical ensembles.