| clouds(uncertainty, risk, hazard, exposure, peril) |
| coercion(noun, trouble, force, strain, difficulty) |
| complication(noun, trouble, worry, difficulty, anxiety) |
| concern(noun, action, cause, thing, condition) |
| condition(noun, state, action, fix, cause) |
| confrontation(noun, trouble, change, mess, situation) |
| convergence of events(expression, idiom) |
| corner(noun, trouble, change, fix, difficulty) |
| critical |
| critical juncture |
| critical point |
| critical situation(noun, expression, idiom, trouble, change) |
| criticalness(noun, difficulty, demand, need, necessity) |
| crucial period |
| culmination(noun, trouble, change, twist, mess) |
| curtailment(noun, want, need, loss, miss) |
| dead end(noun, expression, trouble, difficulty, pain) |
| deadlock(noun, trouble, change, fix, difficulty) |
| decrease(noun, want, need, loss, miss) |
| deep water(noun, expression, trouble, fix, difficulty) |