That actually doesn't match the meanings of househouse and boatboat in the chart. The hovertext specifies that you can refer to the contained object by flipping

That actually doesn't match the meanings of househouse and boatboat in the chart. The hovertext specifies that you can refer to the contained object by flipping the order, so a moonmoon can also refer to the smaller moon orbiting around a larger one: > The <x> that is held by <y> is also a <y><x>, so if you go to a food truck, the stuff you buy is truck food.