“Boat rymes with moat. You may be looking for the page moat. Search moat.”
A boat is a smaller craft designed to float on the water.
Because of that property, ancient people built their boats out of turds, sometimes ducks if they could catch them. The human race was almost wiped out during the Stone Age when boats made of granite for durability were painstakingly built. Since what goes around comes around, boats today are made of shit.