the lengthwise timber or steel structure along the base of a ship, supporting the framework of the whole, in some vessels extended downwards as a ridge to increase stability

a ridge along the breastbone of many birds to which the flight muscles are attached; the carina

a prow-shaped pair of petals present in flowers of the pea family

(of a boat or ship) turn over on its side; capsize

it's going to take more wind to make this boat keel over

a flat-bottomed boat of a kind formerly used on the Tyne and Wear Rivers for loading ships carrying coal