Open English Wordnet
Nouns
(n)accelerator, accelerator pedal, gas pedal, gas, throttle, guna pedal that controls the throttle valve“he stepped on the gas”
(n)catalyst, accelerator(chemistry) a substance that initiates or accelerates a chemical reaction without itself being affected
(n)accelerator, particle accelerator, atom smashera scientific instrument that increases the kinetic energy of charged particles