1. the act of paying for the use of something (as an apartment or house or car)

2. (football) the player who is carrying (and trying to advance) the ball on an offensive play

3. United States civil rights leader who refused to give up her seat on a bus to a white man in Montgomery (Alabama) and so triggered the national Civil Rights movement (born in 1913)

5. the English language as used in the United States

7. a plot of ground where plants are cultivated

8. the descendants of one individual

10. a unit of measurement for advertising space

11. a periodic count of the population

4. material in the top layer of the surface of the earth in which plants can grow (especially with reference to its quality or use)

6. the act of observing; taking a patient look

9. the condition of being unable to perform as a consequence of physical or mental unfitness

12. denoting or deriving from or distinctive of the ways of living built up by a group of people