S1U1B3M3E1R1S1I1B3L1E1S1
18 points
SUBMERSIBLES is validvalid
SUBMERSIBLE, [n]
SUBMERSIBLE, a vessel used for undersea exploration or maintenance, also SUBMERGIBLE [n]
SUBMERSIBLE, [n]
SUBMERSIBLE, a vessel used for undersea exploration or maintenance, also SUBMERGIBLE [n]