M3O1N1O1S1T1O1M3E1
13 points
MONOSTOME is validvalid
having only one mouth, pore or similar opening, also MONOSTOMOUS
having only one mouth, pore or similar opening, also MONOSTOMOUS
having only one mouth, pore or similar opening, also MONOSTOMOUS
having only one mouth, pore or similar opening, also MONOSTOMOUS