| Challenges for movers | 21 |
| Challenges for rats | 19 |
| Challenges for Retton | 21 |
| Challenges in a child's puzzle book | 39 |
| Challenges moguls | 17 |
| Challenges to a duel | 20 |
| Challenges with dead ends | 25 |
| Challenging | 11 |
| Challenging area at Augusta National, as it's facetiously called | 68 |
| Challenging bowling pin arrangement | 35 |
| Challenging Chopin piece | 24 |
| Challenging chore | 17 |
| Challenging curve | 17 |
| Challenging curves | 18 |
| Challenging delinquent | 22 |
| Challenging employer for a maid | 31 |
| Challenging exam | 16 |
| Challenging exercise | 20 |
| Challenging for a sitter | 24 |
| Challenging locks | 17 |
| Challenging move | 16 |
| Challenging opening | 19 |
| Challenging peak | 16 |
| Challenging person | 18 |
| Challenging phase of a child's development | 46 |
| Challenging potato chip quantity | 32 |
| Challenging puzzle | 18 |
| Challenging puzzles | 19 |
| Challenging question | 20 |
| Challenging reply | 17 |
| Challenging request | 19 |
| Challenging riddle | 18 |
| Challenging roommates | 21 |
| Challenging tennis play | 23 |
| Challenging tests | 17 |
| Challenging the rapids, maybe | 29 |
| Challenging to corner | 21 |
| Challenging way to race | 23 |
| Challenging winds | 17 |
| Challenging words | 17 |
| Challenging years | 17 |
| Chalmers' business partner | 30 |
| Chalmers's business partner | 31 |
| Chalon's river | 18 |
| Chalon-sur-___, city SSW of Dijon | 33 |
| Chalon-sur-___, France | 22 |
| CHALTUPID | 9 |
| Chalupa alternative | 19 |
| Chalupa cousin | 14 |
| Chalupa kin | 11 |
| Chalybite and limonite, e.g. | 28 |
| Chambéry shout | 17 |
| Chamber | 7 |
| Chamber bouncer | 15 |
| Chamber composition | 19 |
| Chamber effect | 14 |
| Chamber ensemble | 16 |
| Chamber ensemble player | 23 |
| Chamber exit | 12 |
| Chamber for a chef | 18 |
| Chamber for Child | 17 |
| Chamber for drying | 18 |
| Chamber for measuring air velocities | 36 |
| Chamber group | 13 |
| Chamber group income? | 21 |
| Chamber group instrument | 24 |
| Chamber group member? | 21 |
| Chamber group, maybe | 20 |
| Chamber group, often | 20 |
| Chamber group, perhaps | 22 |
| Chamber groups | 14 |
| Chamber head? | 13 |
| Chamber in a pizzeria | 21 |
| Chamber instrument | 18 |
| Chamber lead-in | 15 |
| Chamber music | 13 |
| Chamber music group | 19 |
| Chamber music instrument | 24 |
| Chamber music instrument, sometimes | 35 |
| Chamber music instruments | 25 |
| Chamber music piece | 19 |
| Chamber of commerce policies | 28 |
| Chamber of the heart | 20 |
| Chamber opening? | 16 |
| Chamber phenomenon | 18 |
| Chamber piece | 13 |
| Chamber quartet? | 16 |
| Chamber sound | 13 |
| Chamber starter | 15 |
| Chamber stock | 13 |
| Chamber to bake in | 18 |
| Chamber within a glacier | 24 |
| Chamber work | 12 |
| Chamber worker?: Abbr. | 22 |
| Chamber workers: Abbr. | 22 |
| Chamber-music composition | 25 |
| Chamber-music ensemble | 22 |
| Chamber-music group | 19 |
| Chamber-music piece | 19 |
| Chamber: Comb. form | 19 |