>1. The bandage was wound around the wound.
>2. The farm was used to produce produce.
>3. The dump had to refuse more refuse.
>4. We must polish the Polish furniture
>5. The soldier decided to desert his dessert in the desert.
>6. Since there was no time like the present, it was time to present the present.
>7. The farmer taught his sow to sow.
>8. After a number of injections my jaw got number.
>9. The insurance was invalid for the invalid.
>10. They were too close to the door to close it.
>11. I shed a tear when I saw the tear in the painting.

Yep, that's the classic beginners' set. For more profound investigations, check Ambiguity, thy name is english.