S1H4I1P3W4O1R1M3S1
19 points
SHIPWORMS is validvalid
SHIPWORM, a wormlike mollusk
SHIPWORM, a wormlike mollusc, aka teredo, that makes shell-lined tunnels in submerged wood
SHIPWORM, a wormlike mollusk
SHIPWORM, a wormlike mollusc, aka teredo, that makes shell-lined tunnels in submerged wood