SHIPLAP is validvalid

to clad a vertical surface using rabbeted wood [v SHIPLAPPED, SHIPLAPPING, SHIPLAPS]

51,627 of 196,601 in NWL2023·also valid in CSW24

an arrangement of overlapping planks on a ship [n -S] / to overlap planks in this way [v SHIPLAPPED, SHIPLAPPING, SHIPLAPS]