Los Angeles (a census-designated place in Willacy County, Texas, United States) / Los Angeles River (a river in California, United States) / Los Angeles (a large city in California, United States)

a rib (curved bone)

robotics

six-chambered (revolver), six-shooter

(mathematics) topology (study of geometric properties that are not changed by stretching etc.)

(music) rock (style of music) / on the rocks (served over ice)

lock

lock

(film) a premiere; the first showing of a movie to a general audience

blind alley, cul-de-sac, impasse, dead-end, dead-end street