| challenge law | 11.59 | They set out to challenge the law. | ||
| challenge constitutionality | 8.89 | Lederman challenged the constitutionality of the ban. | ||
| challenge decision | 8.56 | Prosecutors challenged the decision and won. | ||
| challenge authority | 6.78 | We challenged authority. | ||
| challenge result | 6.65 | He said he would challenge the results. | ||
| challenge legality | 5.53 | Wahid has vowed to challenge its legality. | ||
| challenge rule | 5.27 | But the rules are being challenged by Europe. | ||
| challenge notion | 4.81 | Carolina challenges old notions. | ||
| challenge ruling | 4.81 | Roethlisberger challenged the ruling. | ||
| challenge claim | 3.62 | Unions challenge that claim. | ||
| challenge dismissal | 3.36 | She is challenging the dismissal in court. | ||
| challenge government | 3.16 | Sandinistas challenge government in the streets. | ||
| challenge view | 3.16 | Oates challenges neither view. | ||
| challenge assumption | 2.96 | Two studies challenge assumptions. | ||
| challenge policy | 2.96 | A Muslim challenged that policy. | ||
| challenge idea | 2.83 | He challenged ideas. | ||
| challenge plan | 2.83 | Democrats were quick to challenge the plan. | ||
| challenge validity | 2.83 | Pharmacia challenged the validity of the patents. | ||
| challenge action | 2.63 | Two investors challenged that action, however. | ||
| challenge assertion | 2.50 | But BU lawyers challenged that assertion. |