| A | B |
| acu | to sharpen |
| cav | to make hollow |
| cad, cas | to fall |
| cau | to burn |
| sed | to sit, settle, calm |
| cap(ere), cept, cip | to take, hold, seize |
| aculeate | having a stinger, as a bee or wasp |
| acuminate | tapering to a point |
| acute | having a sharp point or tip |
| cavernous | filled with caverns, cavities, or hollow areas |
| cavity | a hollow or hole, esp. inside the body |
| excavate | to make a hole in; hollow out |
| caducous | dropping off or shedding at an early stage of development |
| cascade | a waterfall or series of small waterfalls over steep rocks |
| cast | to throw, shed or molt; to throw on the ground |
| sedative | having a soothing or calming effect |
| sedentary | characterized by or requiring much sitting |
| sediment | material that settles to the bottom of a liquid |
| captive | one that is forcibly taken and held prisoner |
| intercept | to stop, deflect, or interrupt the progress or intended course of |
| participate | to take part in something |
| caustic | capable of burning, corroding, dissolving or eating away by chemical action |
| cauterize | to burn or sear with a cautery |
| cautery | an instrument, such as a laser or an electric current used to burn tissue |