1. (verb) move faster

• quicken
• speed
• speed up

2. (verb) cause to move faster

• speed
• speed up

1. (verb) move faster

• deepen
• intensify

2. (verb) cause to move faster

• alter
• change
• modify

1. (verb) move faster

• brisk
• brisk up
• brisken

1. (verb) move faster

• acceleration
• acceleration
• quickening
• quickening
• speedup
• speedup
• accelerative
• accelerative
• acceleratory
• acceleratory
• fastness
• speed
• swiftness
• hurrying
• speed
• speeding
• speed
• velocity

2. (verb) cause to move faster

• acceleration
• acceleration
• quickening
• quickening
• speedup
• speedup
• acceleration
• accelerative
• accelerative
• acceleratory
• acceleratory
• accelerator
• throttle
• throttle valve
• accelerator
• accelerator pedal
• gas
• gas pedal
• gun
• throttle
• fastness
• speed
• swiftness
• hurrying
• speed
• speeding
• speed
• velocity

1. (verb) move faster

• decelerate
• retard
• slow
• slow down
• slow up

2. (verb) cause to move faster

• decelerate
• slow down