P3R1O1B3O1S1C3I1D2I1A1N1S1
20 points
PROBOSCIDIANS is validvalid
PROBOSCIDIAN, [n]
PROBOSCIDIAN, any of an order of large mammals comprising the elephants and extinct related forms, also PROBOSCIDEAN [n]
PROBOSCIDIAN, [n]
PROBOSCIDIAN, any of an order of large mammals comprising the elephants and extinct related forms, also PROBOSCIDEAN [n]