Antonym of decelerate

Antonyms of verb decelerate

2 senses of decelerate

Sense 1:

decelerate, slow, slow down, slow up, retard
Antonym of accelerate (Sense 1)
=>accelerate, speed up, speed, quicken

Sense 2:

decelerate, slow down
Antonym of accelerate (Sense 2)
=>accelerate, speed, speed up