| A | B |
|---|
| abrupt | sudden |
| absence | lack of |
| accelerate | to increase the speed |
| accumulation | the act of piling up |
| adjustment | change to make something better; a correction |
| cavity | hollow place or hole |
| cease | to stop |
| circumference | the distance around |
| connect | to fasten or join together |
| diagonal | having a slanted direction |
| exact | very accurate |
| interval | space or time between |
| magnify | to make something seem larger |
| parallel | going in the same direction and always the same distance apart |
| rate | number measured against the number of something else |
| reserve | save until a later time |
| scant | not quite a full measure |
| semi-circular | having the shape of a half-circle |
| taper | to become or make gradually smaller at one end |
| vertical | upright; straight up and down |
