Yes, rock is a Scrabble word!

Verb

1. Move back and forth or sideways

2. Cause to move back and forth

Noun

1. A lump or mass of hard consolidated mineral matter

2. Material consisting of the aggregate of minerals like those making up the Earth's crust

3. United States gynecologist and devout Catholic who conducted the first clinical trials of the oral contraceptive pill (1890-1984)

4. (figurative) someone who is strong and stable and dependable

5. Hard bright-colored stick candy (typically flavored with peppermint)

6. A genre of popular music originating in the 1950s; a blend of black rhythm-and-blues with white country-and-western

7. Pitching dangerously to one side