| Word | Definitions | Synonyms |
|---|---|---|
| accelerate | (verb) move faster | Synonyms: quicken, speed, speed up |
| (verb) cause to move faster | Synonyms: speed, speed up | |
| decelerate | (verb) lose velocity; move more slowly | Synonyms: retard, slow, slow down, slow up |
| (verb) reduce the speed of | Synonyms: slow down |