| challenge face | 1.25 | Those are just a few of the challenges shoppers face. | ||
| challenge grant | 0.53 | The Moody Foundation put up a challenge grant to help raise more money. | ||
| challenge match | 0.53 | For the last two years, he and Paul Soloway were the anchor pair in a series of Internet challenge matches. | ||
| challenge lie | 0.33 | Another challenges lies to the east. | ||
| challenge system | 0.33 | The Cowboys even managed to whiff against the NFL instant-replay challenge system. | ||
| challenge trophy | 0.33 | It received a challenge trophy and a multimedia computer. | ||
| challenge team | 0.26 | Six of the seven international challenge teams also went racing on Saturday. |