S1U1B3B3A1S1S1E1S1
13 points
SUBBASSES is validvalid
SUBBASS, a pedal stop producing the lowest tones of an organ [n]
SUBBASS, a pedal stop producing the lowest tones of an organ [n]
SUBBASS, a pedal stop producing the lowest tones of an organ [n]
SUBBASS, a pedal stop producing the lowest tones of an organ [n]