S: (n) keel (the median ridge on the breastbone of birds that fly)
S: (n) keel (one of the main longitudinal beams (or plates) of the hull of a vessel; can extend vertically into the water to provide lateral stability)
Verb
S: (v) stagger, reel, keel, lurch, swag, careen (walk as if unable to control one's movements) "The drunken man staggered into the room"