- washboard, splashboard - protective covering consisting of a broad plank along a gunwale to keep water from splashing over the side
--1 is a kind of protective covering, protective cover, protection
--1 is a part of vessel, watercraft - splashboard, splasher, dashboard - protective covering consisting of a panel to protect people from the splashing water or mud etc.
--2 is a kind of protective covering, protective cover, protection
--2 is a part of vehicle