| Ice Bucket Challenge cause: Abbr. |
| ALS Ice Bucket Challenge participant who's scored 4,976 buckets for the SuperSonics and Thunder: 2 wds. |
| Classroom challenge |
| Challenged a verdict |
| Accepted a gunslinger's challenge |
| Smart HS student's challenges |
| ALS Ice Bucket Challenge participant who's scored 12,192 buckets for the Bulls and Wizards: 2 wds. |
| Baseball's reserve clause challenger |
| Gunslinger's challenge |
| Arduous challenge |
| Acronym for the visually challenged |
| Political challenger's promise |
| Rodeo challenges |
| Competitive challenges |
| Exhibitionist's challenge |
| ALS Ice Bucket Challenge participant who's scored 8,326 buckets for the Cavaliers and Heat: 2 wds. |
| Louis challenger |
| Nanny's challenges |
| Accepts a challenge |
| Aid for the directionally-challenged |
| Alyssa of "Romantically Challenged |
| Intellectually challengedone |
| Climbing challenges |
| Duel challenge |
| Outfielder who challenged baseball's reserve clause |
| Laundry challenge |
| America's Cup challenger |
| Attacked, as a challenge |
| Schoolyard challenge |
| Challenged the verdict |