| Term | Definition |
| CUR | To run |
| Concourse | A running together; a large open space where crowds gather |
| Concur | To run together;to agree |
| Concurrent | Running together; occuring at the same thime |
| Courier | One who carries messages |
| Course | A running onward from one point to the next |
| Currency | Money that passes from one person to another in a country |
| Current | The flow of water, air or electricity |
| Curriculum | Originaly, a race |
| Cursive | Running along; hand witting with letters joined |
| Cursory | Running over rapidly without attention to detail |
| Discourse | To run about; to speak at length |
| Excursion | Running out somewhere; a short journey |
| Occur | To run toward; to take place |
| Precursor | A person or thing that runs before |