Definitions:
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

a flat-bottomed boat of a kind formerly used on the tyne and wear rivers for loading ships carrying coal.