Cases of word usage

1) a large piece of rock or stone (boulder)

2) a larger wave breaking against a rock etc. (breaker)

3) a high, sharp mass of rock (crag)

4) a narrow opening or crack (in a rock etc) (crevice)

5) (a part or mark of) a prehistoric animal or plant once buried in earth, now hardened like rock (fossil)

6) a narrow shelf coming out from a wall, cliff, rock or other upright surface (ledge)

7) a kind of rock containing lime, used for building and to make cement (limestone)

8) earth, rock etc carried and deposited by a glacier (moraine)

9) that part of a layer (of rock etc) which can be seen (outcrop)

10) a line of rock etc just below or above the surface of the sea (reef)