Accelerate means to speed up. A car accelerates when you step on the gas. You can accelerate the process of getting a visa if you happen to know someone who works in the consulate.

The fastest Amtrak trains are called the Acela line, a made-up word intended to suggest accelerate and therefore communicate that these trains are fast. If you are standing close to one when it zooms by, you may find yourself having an accelerated heart rate — they move pretty fast!

Definitions of accelerate
  1. verb
    move faster
    “The car accelerated
    synonyms: quicken, speed, speed up
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    decelerate, retard, slow, slow down, slow up
    lose velocity; move more slowly
    brisk, brisk up, brisken
    become brisk
    type of:
    deepen, intensify
    become more intense
  2. verb
    cause to move faster
    “He accelerated the car”
    synonyms: speed, speed up
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    decelerate, slow down
    reduce the speed of
    type of:
    alter, change, modify
    cause to change; make different; cause a transformation
Word Family