- washboard - device consisting of a corrugated surface to scrub clothes on
--1 is a kind of device
- washboard, splashboard - protective covering consisting of a broad plank along a gunwale to keep water from splashing over the side
--2 is a kind of protective covering, protective cover, protection
--2 is a part of vessel, watercraft - washboard, splashboard - protective covering consisting of a broad plank along a gunwale to keep water from splashing over the side