| A | B |
| Cycle | a repeating series of events or actions |
| Cyclical | happening again and again in the same order |
| Cyclone | an extremely large powerful and destructive storm |
| Circumference | the length of a line that goes around a circle or other round shape |
| Circuit | the complete path that an electric current travels |
| Circumstance | conditions that surround or cause an event to happen |
| Circumvent | the get around something in a clever and sometimes dishonest way |
| Central | located in the center or a thing or place |
| Concentric | when two or more object share the same center point |
| Eccentric | tending to act in strange or unusual way |