| A | B |
| coexist | to live together peacefully |
| coincidence | something that happens by accident; things come together by chance |
| collect | to gather things together |
| collide | to bump into each other |
| comrade | a friend |
| concur | to have the same opinion |
| coordinate | to work together or to help people work together |
| correspond | to be very similar to something else |
| communal | shared by a community |
| composite | to be made from several different things |
| alliteration | a tongue twister |
| repetition | to say or do something over and over |
| onomatopoeia | examples are "buzz" "wham" "plop" |
| summarize | to tell the main points of a piece of writing |