accelerator
ac-cel-er-a-tor
noun
A pedal in a motor vehicle used to increase engine speed.
"She pressed the accelerator to overtake the lorry."
noun
A device or substance that increases the speed or rate of something.
"This additive acts as an accelerator for the paint drying."
noun
A machine that propels charged particles to very high speeds.
"Scientists use a particle accelerator to study subatomic particles."
Thesaurus
Synonyms: gas, gas pedal, gun, accelerator pedal, throttle, catalyst, particle accelerator, atom smasher, throttle valve
Antonyms: anticatalyst